Title 24 · California Energy Code
How to calculate allowed outdoor lighting power and use Lighting Zones (Title 24 Part 1)
For a homeowner: determine which Lighting Zone your property is in, measure the hardscape area illuminated (per the 10× mounting‑height rule), multiply by the zone’s watts‑per‑square‑foot allowance in the code tables, add only the few specific allowances allowed, and ensure fixtures and controls meet Part 6 requirements; consult § 10‑114, § 170.2(e)6 and § A6.209.4.2 for the controlling rules.
Last reviewed: July 6, 2026
What the code requires — plain English
The amount of outdoor lighting you may install is limited by the Allowed Outdoor Lighting Power, which is calculated by Lighting Zone (LZ0–LZ4) as defined in § 10‑114 of Title 24, Part 1. The performance sections that apply this method include § 170.2(e)6 for multifamily/mixed‑use performance compliance and the voluntary Appendix rule § A6.209.4.2 — each says the actual installed outdoor lighting power must be no greater than the allowed outdoor lighting power calculated by lighting zone.
The single most important rule: calculate the illuminated hardscape area around each luminaire, multiply that area by the Area Wattage Allowance (AWA) for the site’s Lighting Zone from the code tables, then add only the specific additional allowances that are allowed by the code.
Requirements in detail
Key defined terms (first mention bolded)
- Lighting Zone: a geographic designation (LZ0 to LZ4) set by the California Energy Commission in § 10‑114 that determines AWA and other outdoor lighting requirements.
- Allowed Outdoor Lighting Power: the total wattage permitted for an outdoor installation after applying the AWA and any allowable additional allowances (specific applications or local ordinance allowances). See § 170.2(e)6 and § A6.209.4.2.
- Illuminated hardscape area: the plan‑view area to which an outdoor luminaire contributes illumination for the purposes of the AWA calculation (defined below).
How to compute allowed outdoor lighting power — step summary (code anchors shown)
- Identify the project’s Lighting Zone per § 10‑114.
- Determine the illuminated hardscape area for the site in plan view using the luminaire mounting‑height rule (see next subsection). Multiply that area by the Area Wattage Allowance (AWA) for the applicable Lighting Zone from Table A6.209.4‑A (or Table 140.7‑A in Part 6) to get the general hardscape allowance. See § A6.209.4.4.1.1.
- Add any allowed specific application allowances (e.g., building entrances, sales canopies, outdoor dining, security lighting) that apply, per the code’s additional‑allowance rules. See § A6.209.4.4.2 / § 170.2(e)6Dii.
- If a local ordinance requires higher luminance and meets the Part‑1 requirements, you may include the local‑ordinance allowance (limited by the table in the code). See § A6.209.4.4.3.
- The sum of general hardscape + specific application allowances + local ordinance allowances is the Allowed Outdoor Lighting Power. The actual installed wattage must be ≤ that total. See § A6.209.4.4 and § 170.2(e)6D.
Illuminated hardscape area: the geometric rule
- For each luminaire/pole, draw a square centered on the luminaire with side length equal to 10 × the luminaire mounting height; the union of those squares (minus areas inside buildings, beyond property lines, or obstructed) is the illuminated hardscape area. The code also includes planter strips ≤ 10 ft wide in the illuminated area under certain conditions. See § A6.209.4.4.1.1.
Controls, equipment & luminaire performance you must also meet
- Outdoor luminaires above certain lumen thresholds must comply with BUG (backlight/uplight/glare) requirements (Part 6 § 130.2 and Part 11 reference). Outdoor lighting must be controlled by photocontrol/astronomical time switch and automatic scheduling per the Part 6 controls sections. These are separate mandatory requirements that apply in addition to the wattage limits. See § 130.2 and § 130.2(c).
Decision‑relevant dimensions and values (quick reference table)
| Decision item | Value / rule | Code Reference |
|---|---|---|
| Determine Lighting Zone | Use the Lighting Zone map/definition in § 10‑114 (LZ0–LZ4) | § 10‑114 |
| Illuminated hardscape square size | Side = 10 × luminaire mounting height (use plan view union; trim to property/building edges) | § A6.209.4.4.1.1 |
| Inclusion of narrow planters | Planters ≤ 10 ft wide that are within lighting application may be included | § A6.209.4.4.1.1 |
| Area Wattage Allowance (AWA) | Multiply illuminated hardscape area × AWA for the site’s Lighting Zone (values are in code Table A6.209.4‑A / Table 140.7‑A) | § A6.209.4.4.1.1 and § 140.7(d)1 |
| Specific application allowances | Add only the allowed application allowances; cannot trade allowances between specific applications | § A6.209.4.4.2 and § 170.2(e)6B |
| Local ordinance allowance | Only if local ordinance meets Part‑1 criteria; additional allowance limited by code table | § A6.209.4.4.3 |
Exceptions & special cases
- A luminaire is exempt from the allowed outdoor lighting power limits when more than 50% of its light goes to certain applications: temporary lighting; FAA/Coast Guard required lighting; public streets/roadways and traffic signage; sports/athletic fields; public monuments; landscape lighting; signs meeting other sign rules; etc. (the lists appear in both Part 6 and Appendix A6). See § 170.2(e)6 exceptions and § A6.209.4.
- Local governments may amend Lighting Zones if they follow the process in § 10‑114; where amended, the local zone mapping controls the applicable AWA. See § A6.209.4.2.
- Additional allowances that come from a local ordinance are limited: the code gives the smaller of (1) the table allowance or (2) the actual installed power that meets the ordinance. See § A6.209.4.4.3.
If you need the numeric AWA values for LZ0–LZ4 (the W/ft² numbers), those are published in Table A6.209.4‑A (and Table 140.7‑A in Part 6). Those numeric table entries were not retrieved in the files provided here; you must consult Table A6.209.4‑A / Table 140.7‑A in the official code to obtain the exact W/ft² values. See § A6.209.4.4.1.1 and § 140.7(d)1.
Common mistakes
- Treating each luminaire’s full pole‑area as independent without removing overlaps or trimming to property/building lines. The code requires the union of the 10×MH squares and removal of areas beyond property/building lines. See § A6.209.4.4.1.1.
- Using the wrong Lighting Zone (local amendments to § 10‑114 can change the zone). Always check the local adopted map/ordinance and § 10‑114.
- Trying to “trade” specific‑application allowances between categories (the code forbids trading between specific applications or between outdoor and indoor allowances). See § 170.2(e)6B and § A6.209.4.4.
- Forgetting mandatory luminaire shielding, control, and scheduling requirements (Part 6 § 130.2 and related control sections) — wattage compliance is necessary but not sufficient.
Worked example — step‑by‑step (illustrative)
Note: the code table values for AWA (W/ft²) were not included in the retrieved files. This worked example uses a hypothetical AWA for illustration only. Obtain the official AWA from Table A6.209.4‑A (or Table 140.7‑A) before final calculations. See § A6.209.4.4.1.1.
Scenario:
- Site type: retail parking lot + walkways (hardscape).
- Luminaire mounting height (MH): 15 ft for all pole lights.
- Pole layout: 6 poles; illuminated squares overlap; after union and trimming to property lines the total illuminated hardscape = 18,000 ft² (you derive this from the union of 6 squares, see § A6.209.4.4.1.1).
- Lighting Zone: LZ2 (verify in § 10‑114).
- Hypothetical AWA for LZ2 (illustrative only): 0.06 W/ft². (DO NOT use without confirming Table A6.209.4‑A.)
Steps:
- General hardscape allowance = Illuminated hardscape area × AWA = 18,000 ft² × 0.06 W/ft² = 1,080 W. (Again, replace 0.06 with the official AWA from the code table.) See § A6.209.4.4.1.1.
- Add any permitted specific application allowances that apply (for example, building entrance allowance, outdoor dining, or sales canopy allowances). Suppose there is an adjacent outdoor dining area that qualifies for an additional illustrative allowance of 0.135 W/ft² over 400 ft² → extra = 54 W. (Use the official table for exact numbers and qualifying rules.) See § A6.209.4.4.2.
- If a local ordinance requires higher illuminance and meets the Part‑1 criteria, compute the local‑ordinance allowance and add the smaller of that allowance or the actual installed power meeting the ordinance. See § A6.209.4.4.3.
Total allowed (illustrative) = 1,080 W + 54 W = 1,134 W. The installed connected wattage of all outdoor luminaires must be ≤ this allowed value, and luminaires/controls must also meet BUG, photocontrol, and scheduling requirements in Part 6.
Related provisions (quick list)
- § 10‑114 — Lighting Zone definitions and amendment procedures (Part 1).
- § 170.2(e)6 — Multifamily/mixed‑use performance requirements referencing Lighting Zones.
- § A6.209.4.2 — Appendix method: allowed outdoor lighting shall be calculated by Lighting Zone.
- § A6.209.4.4 — Details on calculating general hardscape, specific application, and local ordinance allowances.
- § 140.7 — Prescriptive requirements for outdoor lighting (Part 6) — includes the same lighting‑zone calculation for nonresidential/hotel occupancies.
- § 130.2 — Luminaire shielding (BUG) and outdoor lighting control requirements (Part 6).
Code references
Grounded in the retrieved California Energy Code — click a citation to read the verbatim passage:
§ 170.2 High relevance — show source text
Reserved.
Outdoor lighting. A. A multifamily or mixed occupancy outdoor lighting installation complies with this section if it meets the requirements in Subsections 170.2(e)6B and C, and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection 170.2(e)6D. The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114. Exceptions to Section 170.2(e)6A: When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall not be required to comply with Section 170.2(e)6:
i. Temporary outdoor lighting. ii. Lighting required and regulated by the Federal Aviation Administration and the Coast Guard.
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iii. Lighting for public streets, roadways, highways and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way owned or maintained by a local municipality or utility. iv. Lighting for sports and athletic fields, and children’s playgrounds.
v. Reserved.
vi. Lighting of public monuments. vii. Lighting of signs complying with the requirements of Sections 160.5(d) and 170.2(e)7. viii. Lighting of stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance, and ramps that are other than parking garage ramps. ix. Landscape lighting.
x. Reserved.
xi. Lighting for outdoor theatrical and other outdoor live performances, provided that these lighting systems are additions to area lighting systems and are controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators. xii. Outdoor lighting systems for qualified historic buildings, as defined in the California Historic Building Code (Title 24, Part 8), if they consist solely of historic lighintg components or replicas of historic lighting components. If lighting systems for qualified historic buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other outdoor lighting systems for qualified historic buildings shall comply with Section 170.2(e)6. B. Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows: i. Allowed lighting power determined according to Section 170.2(e)6Di for general hardscape lighting allowance may be traded to specific applications in Section 170.2(e)6Dii, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section 170.2(e)6Dia. ii. Allowed lighting power determined according to Section 170.2(e)2Dii for additional lighting power allowances for specific applications shall not be traded between specific applications, or to hardscape lighting in Section 170.2(e)6Di. iii. Trading off lighting power allowances between outdoor and indoor areas shall not be permitted. C. Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 160.5(b)1. D. **Calculation of allowed lighting power.
§ 209.4.4.2 High relevance — show source text
Allowed lighting power determined according to Section A6.209.4.4.2 for additional lighting power allowances for specific applications shall not be traded between specific applications or to hardscape lighting in Section A6.209.4.4.1.
Allowed lighting power determined according to Section A6.209.4.4.3 for additional lighting power allowances for local ordinance shall not be traded to specific applications in Section A6.209.4.4.2 or to hardscape areas not covered by the local ordinance.
Trading off lighting power allowances between outdoor and indoor areas shall not be permitted.
A6.209.4.2 Outdoor lighting power. An outdoor lighting installation complies with this section if the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Section A6.209.4.4 The allowed outdoor lighting shall be calculated by Lighting Zone as defined in Section 10-114 of Title 24, Part 1. Local governments may amend lighting zones in compliance with Section 10-114 of Title 24, Part 1.
A6.209.4.3 Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 130(d) of Title 24, Part 6.
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APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]
A6.209.4.4 Calculation of allowed lighting power. The allowed lighting power shall be the combined total of the sum of the general hardscape lighting allowance determined in accordance with Section A6.209.4.4.1, the sum of the additional lighting power allowance for specific applications determined in accordance with Section A6.209.4.4.2 and the sum of the additional lighting power allowances for local ordinance determined in accordance with Section A6.209.4.4.3.
A6.209.4.4.1 General hardscape lighting allowance. Determine the general hardscape lighting power allowances as follows:
A6.209.4.4.1.1 The general hardscape area of a site shall include parking lot(s), roadway(s), driveway(s), sidewalk(s), walkway(s), bikeway(s), plaza(s) and other improved area(s) that are illuminated. In plan view of the site, determine the illuminated hardscape area, which is defined as any hardscape area that is within a square pattern around each luminaire or pole that is ten times the luminaire mounting height with the luminaire in the middle of the pattern, less any areas that are within a building, beyond the hardscape area, beyond property lines or obstructed by a structure. The illuminated hardscape area shall include portions of planters and landscaped areas that are within the lighting application and are less than or equal to 10 feet wide in the short dimensions and are enclosed by hardscape or other improvement on at least three sides. Multiply the illuminated hardscape area by the Area Wattage Allowance (AWA) from Table A6.209.4-A for the appropriate Lighting Zone.
§ 140.7. High relevance — show source text
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COMPLIANCE APPROACHES FOR ACHIEVING ENERGY EFFICIENCY
- Outdoor lighting systems for qualified historic buildings, as defined in the California Historic Building Code (Title 24, Part 8), if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems for qualified historic buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other outdoor lighting systems for qualified historic buildings shall comply with Section 140.7.
(b) Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows:
- Allowed lighting power determined according to Section 140.7(d)1 for general hardscape lighting allowance may be traded to specific applications in Section 140.7(d)2, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section 140.7(d)1A.
- Allowed lighting power determined according to Section 140.7(d)2 for additional lighting power allowances for specific applications shall not be traded between specific applications, or to hardscape lighting in Section 140.7(d)1.
- Trading of lighting power allowances between outdoor and indoor areas shall not be permitted.
(c) Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 130.0(c).
(d) Calculation of allowed lighting power. The allowed lighting power shall be the combined total of the sum of the general hardscape lighting allowance determined in accordance with Section 140.7(d)1, and the sum of the additional lighting power allowance for specific applications determined in accordance with Section 140.7(d)2.
- General hardscape lighting allowance. Determine the general hardscape lighting power allowances as follows: A. The general hardscape area of a site shall include parking lot(s), roadway(s), driveway(s), sidewalk(s), walkway(s), bikeway(s), plaza(s), bridge(s), tunnel(s), and other improved area(s) that are illuminated. In plan view of the site, determine the illuminated hardscape area, which is defined as any hardscape area that is within a square pattern around each luminaire or pole that is ten times the luminaire mounting height with the luminaire in the middle of the pattern, less any areas that are within a building, beyond the hardscape area, beyond property lines or obstructed by a structure. The illuminated hardscape area shall include portions of planters and landscaped areas that are within the lighting application and are less than or equal to 10 feet wide in the short dimensions and are enclosed by hardscape or other improvement on at least three sides. Multiply the illuminated hardscape area by the area wattage allowance (AWA) from Table 140.7-A for the appropriate lighting zone.
§ 140.7 High relevance — show source text
SECTION 140.7—PRESCRIPTIVE REQUIREMENTS FOR OUTDOOR LIGHTING
(a) An outdoor lighting installation complies with this section if it meets the requirements in Subsections (b) and (c), and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection (d). The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114.
Exceptions to Section 140.7(a): When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall not be required to comply with Section 140.7:
- Temporary outdoor lighting.
- Lighting required and regulated by the Federal Aviation Administration, and the Coast Guard.
- Lighting for public streets, roadways, highways, and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way.
- Lighting for sports and athletic fields, and children’s playgrounds.
- Lighting for industrial sites, including but not limited to, rail yards, maritime shipyards and docks, piers and marinas, chemical and petroleum processing plants, and aviation facilities.
- Lighting of public monuments.
- Lighting of signs complying with the requirements of Sections 130.3 and 140.8.
- Lighting of tunnels, bridges, stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance, and ramps that are other than parking garage ramps.
- Landscape lighting.
- In theme parks: outdoor lighting only for themes and special effects.
- Lighting for outdoor theatrical and other outdoor live performances, provided that these lighting systems are additions to area lighting systems and are controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators.
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- Outdoor lighting systems for qualified historic buildings, as defined in the California Historic Building Code (Title 24, Part 8), if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems for qualified historic buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other outdoor lighting systems for qualified historic buildings shall comply with Section 140.7.
(b) Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows:
- Allowed lighting power determined according to Section 140.7(d)1 for general hardscape lighting allowance may be traded to specific applications in Section 140.7(d)2, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section 140.7(d)1A.
- Allowed lighting power determined according to Section 140.7(d)2 for additional lighting power allowances for specific applications shall not be traded between specific applications, or to hardscape lighting in Section 140.7(d)1.
- Trading of lighting power allowances between outdoor and indoor areas shall not be permitted.
(c) Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 130.0(c).
(d) **Calculation of allowed lighting power.
§ 170.2 High relevance — show source text
Additional LPD only applies to area within
30 feet of an exit. Not applicable to lighting in daylit zones.
8. Tunable white luminaires capable of color change greater than or equal to 2000K CCT, or dim-to-warm luminaires capable of color change greater than or equal to 500K CCT,
connected to controls that allow color changing of the luminaires.|1. Detailed task work—Lighting provides the high level of visual acuity required for activities with close attention to small elements and/or extreme close-up work.
2. MH denotes the luminaire mounting height of the qualified lighting systems.
3. Daylight adaptation zones shall be no longer than 66 feet from the entrance to the parking garage.
4. Reserved.
5. Portable lighting in office areas includes under-shelf or furniture-mounted supplemental task lighting qualifies when controlled by a time clock or an occupancy sensor.
6. Aging Eye/Low-vision areas can be documented as being designed to comply with the light levels in ANSI/IES RP-28 and are or will be licensed by local or state authorities for
either senior long-term care, adult day care, senior support and/or people with special visual needs.
7. Transition lighting OFF at night. Lighting power controlled by astronomical time clock or other control to shut off lighting at night. Additional LPD only applies to area within
30 feet of an exit. Not applicable to lighting in daylit zones.
8. Tunable white luminaires capable of color change greater than or equal to 2000K CCT, or dim-to-warm luminaires capable of color change greater than or equal to 500K CCT,
connected to controls that allow color changing of the luminaires.|Reserved.
Outdoor lighting. A. A multifamily or mixed occupancy outdoor lighting installation complies with this section if it meets the requirements in Subsections 170.2(e)6B and C, and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection 170.2(e)6D. The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114. Exceptions to Section 170.2(e)6A: When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall not be required to comply with Section 170.2(e)6:
i. Temporary outdoor lighting. ii. Lighting required and regulated by the Federal Aviation Administration and the Coast Guard.
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iii. Lighting for public streets, roadways, highways and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way owned or maintained by a local municipality or utility. iv. Lighting for sports and athletic fields, and children’s playgrounds.
v. Reserved.
vi. Lighting of public monuments. vii. Lighting of signs complying with the requirements of Sections 160.5(d) and 170.2(e)7. viii. Lighting of stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance, and ramps that are other than parking garage ramps. ix. Landscape lighting.
x. Reserved.
xi.
§ 209.5. High relevance — show source text
Lighting of public monuments.
Signs shall meet the requirements of Section A6.209.5.
Lighting used in or around swimming pools, water features or other locations subject to Article 680 of Title 24, Part 3, California Electrical Code.
Lighting of tunnels, bridges, stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance and ramps that are other than parking garage ramps.
Landscape lighting.
In theme parks: outdoor lighting for themes and special effects.
Lighting for outdoor theatrical and other outdoor live performances, provided that these lighting systems are additions to area lighting systems and are controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators.
Outdoor lighting systems for qualified historical buildings, as defined in Title 24, Part 8, California Historical Building Code, if they consist solely of historical lighting components or replicas of historical lighting components. If lighting systems for qualified historical buildings contain some historical lighting components or replicas of historical components, combined with other lighting components, only those historical or historical replica components are exempt. All other outdoor lighting systems for qualified historical buildings shall comply with Section A6.209.4.
A.5.209.4.1 Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows:
Allowed lighting power determined according to Section A6.209.4.4.1 for general hardscape lighting allowance may be traded to specific applications in Section A6.209.4.4.2, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section A6.209.4.4.1.1.
Allowed lighting power determined according to Section A6.209.4.4.2 for additional lighting power allowances for specific applications shall not be traded between specific applications or to hardscape lighting in Section A6.209.4.4.1.
Allowed lighting power determined according to Section A6.209.4.4.3 for additional lighting power allowances for local ordinance shall not be traded to specific applications in Section A6.209.4.4.2 or to hardscape areas not covered by the local ordinance.
Trading off lighting power allowances between outdoor and indoor areas shall not be permitted.
A6.209.4.2 Outdoor lighting power. An outdoor lighting installation complies with this section if the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Section A6.209.4.4 The allowed outdoor lighting shall be calculated by Lighting Zone as defined in Section 10-114 of Title 24, Part 1. Local governments may amend lighting zones in compliance with Section 10-114 of Title 24, Part 1.
A6.209.4.3 Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 130(d) of Title 24, Part 6.
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APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]
§ 203.1 High relevance — show source text
ENERGY BUDGET.
GEOTHERMAL.
LONG-TERM SYSTEM COST (LSC).
PROCESS.
RECOVERED ENERGY, ON-SITE.
SOLAR ACCESS.
SOLAR POOL HEATING SYSTEM.
SECTION A5.203—PERFORMANCE APPROACH
A5.203.1 Energy efficiency. Nonresidential, high-rise residential and hotel/motel buildings that include lighting and/or mechanical systems shall comply with Sections A5.203.1.1 and A5.203.1.2. Newly constructed buildings and additions are included in the scope of these sections. Buildings permitted without lighting or mechanical systems shall comply with Section A5.203.1.1 but are not required to comply with Section A5.203.1.2.
A5.203.1.1 Tier 1 and Tier 2 prerequisites. To comply with Tier 1, ONE of the following efficiency measures is required for all applicable components of the building project. To comply with Tier 2, TWO of the following efficiency measures are required.
A5.203.1.1.1 Outdoor lighting. Outdoor lighting requirements are described below.
A5.203.1.1.1.1 Newly installed outdoor lighting power shall be no greater than 90 percent of the Allowed Outdoor Lighting Power, and general hardscape lighting within the scope of Title 24, Part 6, Section 140.7(b)1 shall have a color temperature no higher than 3000K. The Allowed Outdoor Lighting Power calculation is specified in Title 24, Part 6, Section 140.7, Requirements for Outdoor Lighting.
Exception to Section A5.203.1.1.1.1:
- The color temperature requirement is not applicable to the applications identified in the exceptions to Section 140.7(a) of Title 24, Part 6, nor to the applications identified as “specific applications” in Section 140.7(b)2 and Table 140.7-B of Title 24, Part 6.
A5.203.1.1.1.2 Outdoor pole-mounted and arm-mounted luminaires shall be installed with tilting not greater than 10 degrees, or the outdoor luminaires shall be installed with arm-mount or tenon-mount capable of tilting less than or within 10 degrees.
Exceptions to Section A5.203.1.1.1.2:
- Lighting for building facades, public monuments, public art, statues and vertical surfaces of bridges.
- Lighting not permitted by a health or life safety statute, ordinance or regulation to be a cutoff luminaire.
- Temporary outdoor lighting.
- Lighting required and regulated by the Federal Aviation Administration or the Coast Guard.
- Lighting for public streets, roadways, highways, and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way. Luminaires that illuminate the public right of way including publicly-maintained or utility-maintained sidewalks and bikeways.
- Lighting for sports and athletic fields and children’s playgrounds.
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APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES
- Lighting for industrial sites, including but not limited to, rail yards, maritime shipyards and docks, piers and marinas, chemical and petroleum processing plants, and aviation facilities.
§ 140.6 High relevance — show source text
6(c)2Gvii is controlled by a multiscene programmable control system (also known as a scene preset control system). viii. Floor displays shall not qualify for wall display allowances. ix. Qualifying wall lighting shall: a. Be mounted within 10 feet of the wall having the wall display. When track lighting is used for wall display, and where portions of that lighting track are more than 10 feet from the wall and other portions are within 10 feet of the wall, portions of track more than 10 feet from the wall shall not be used for the wall display allowance; and b. Be a lighting system type appropriate for wall lighting. Lighting systems appropriate for wall lighting are lighting track adjacent to the wall, wall-washer luminaires, luminaires behind a wall valance or wall cove, or accent light. (Accent luminaires are adjustable or fixed luminaires providing directional display light.) x. Additional allowed power for wall display lighting is available only for lighting that illuminates walls having wall displays. The length of display walls shall include the length of the perimeter walls, including but not limited to closable openings and permanent full-height interior partitions. Permanent full-height interior partitions are those that (I) extend from the floor to within 2 feet of the ceiling or are taller than 10 feet and (II) are permanently anchored to the floor. xi. Mounting height shall be the luminaire mounting height measured from the finished floor to the bottom of the luminaire. If luminaires are mounted at different mounting heights within the same space, the average mounting height of the luminaires qualified for the additional lighting power allowances in Table 140.6-C can be used to establish the mounting height of the qualified luminaires for calculations of the additional lighting power allowances of the qualified luminaires.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.
SECTION 140.7—PRESCRIPTIVE REQUIREMENTS FOR OUTDOOR LIGHTING
(a) An outdoor lighting installation complies with this section if it meets the requirements in Subsections (b) and (c), and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection (d). The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114.
Exceptions to Section 140.7(a): When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall not be required to comply with Section 140.7:
- Temporary outdoor lighting.
- Lighting required and regulated by the Federal Aviation Administration, and the Coast Guard.
- Lighting for public streets, roadways, highways, and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way.
- Lighting for sports and athletic fields, and children’s playgrounds.
- Lighting for industrial sites, including but not limited to, rail yards, maritime shipyards and docks, piers and marinas, chemical and petroleum processing plants, and aviation facilities.
- Lighting of public monuments.
- Lighting of signs complying with the requirements of Sections 130.3 and 140.8.
§ 201.1 High relevance — show source text
APPENDIX A5-12 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
A5 NONRESIDENTIAL VOLUNTARY MEASURES
DIVISION A5.2 – ENERGY EFFICIENCY
SECTION A5.201—GENERAL
A5.201.1 Scope. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards. It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required findings of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106, prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modifications along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards/2025-building-energy-efficiency
SECTION A5.202—DEFINITIONS
A5.202.1 Definitions. The following terms are defined in Chapter 2.
ENERGY BUDGET.
GEOTHERMAL.
LONG-TERM SYSTEM COST (LSC).
PROCESS.
RECOVERED ENERGY, ON-SITE.
SOLAR ACCESS.
SOLAR POOL HEATING SYSTEM.
SECTION A5.203—PERFORMANCE APPROACH
A5.203.1 Energy efficiency. Nonresidential, high-rise residential and hotel/motel buildings that include lighting and/or mechanical systems shall comply with Sections A5.203.1.1 and A5.203.1.2. Newly constructed buildings and additions are included in the scope of these sections. Buildings permitted without lighting or mechanical systems shall comply with Section A5.203.1.1 but are not required to comply with Section A5.203.1.2.
A5.203.1.1 Tier 1 and Tier 2 prerequisites. To comply with Tier 1, ONE of the following efficiency measures is required for all applicable components of the building project. To comply with Tier 2, TWO of the following efficiency measures are required.
A5.203.1.1.1 Outdoor lighting. Outdoor lighting requirements are described below.
A5.203.1.1.1.1 Newly installed outdoor lighting power shall be no greater than 90 percent of the Allowed Outdoor Lighting Power, and general hardscape lighting within the scope of Title 24, Part 6, Section 140.7(b)1 shall have a color temperature no higher than 3000K. The Allowed Outdoor Lighting Power calculation is specified in Title 24, Part 6, Section 140.7, Requirements for Outdoor Lighting.
Exception to Section A5.203.1.1.1.1:
§ 15-11 Medium relevance — show source text
COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
FOR REFERENCE ONLY: The following table has been reprinted from the IES TM-15-11 Reference standard, see Section 5.106.8.
IES TM-15-11 TABLE A-1—BACKLIGHT RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6 SECONDARY SOLID ANGLE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE SECONDARY SOLID ANGLE LZ 0 LZ 1 LZ 2 LZ 3 LZ 4 Backlight High (BH)
60 to 80 degrees110 500 1,000 2,500 5,000 Backlight Medium (BM)
30 to < 60 degrees220 1,000 2,500 5,000 8,500 Backlight Low (BL)
0 to < 30 degrees110 500 1,000 2,500 5,000 FOR REFERENCE ONLY: The following table has been reprinted from the California Energy Code, Part 6, Title 24, see Section 5.106.8.
TABLE 130.2-A—UPLIGHT RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6 SECONDARY SOLID ANGLE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE SECONDARY SOLID ANGLE LZ 0 LZ 1 LZ 2 LZ 3 LZ 4 Uplight High (UH)
100 to 180 degrees0 10 50 500 1,000 Uplight Low (UL)
90 to < 100 degrees0 10 50 500 1,000 FOR REFERENCE ONLY: The following table has been reprinted from the California Energy Code, Part 6, Title 24, see Section 5.106.8.
TABLE 130.2-B—GLARE RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6 GLARE RATING FOR ASYMMETRICAL LUMINAIRE TYPES
(Type I, Type II, Type III, Type IV)GLARE RATING FOR ASYMMETRICAL LUMINAIRE TYPES
**(Type I, Type II, Type III,§ 10-114 Medium relevance — show source text
Vehicle service station is a gasoline, natural gas, diesel or other fuel dispensing station.
OUTDOOR LIGHTING is electrical lighting used to illuminate outdoor areas.
OUTDOOR LIGHTING ZONE is a geographic area designated by the California Energy Commission in accordance with Part 1, Section 10-114, that determines requirements for outdoor lighting, including lighting power densities and specific control, equipment or performance requirements. Lighting zones are numbered LZ0, LZ1, LZ2, LZ3 and LZ4.
OVERHANG is a contiguous opaque surface, oriented horizontally and projecting outward horizontally from an exterior vertical surface.
PART 1 means Part 1 of Title 24 of the California Code of Regulations.
PART 6 means Part 6 of Title 24 of the California Code of Regulations.
PART-LOAD OPERATION occurs when a system or device is operating below its maximum rated capacity.
PARTICLE SIZE EFFICIENCY is the fraction (percentage) of particles that are captured on air filter equipment as determined during rating tests conducted in accordance with ASHRAE Standard 52.2 or AHRI Standard 680. Particle Size Efficiency is measured in three particle size ranges: 0.3-1.0, 1.0-3.0, 3.0-10 microns.
PHOTOSYNTHETIC PHOTON EFFICACY (PPE) is photosynthetic photon flux divided by input electric power in units of micromoles per second per watt, or micromoles per joule as defined by ANSI/ASABE S640.
PHOTOSYNTHETIC PHOTON FLUX (PPF) is the rate of flow of photons between 400 to 700 nanometers in wavelength from a radiation source as defined by ANSI/ASABE S640.
POOL, PUBLIC is a pool other than a residential pool that is intended to be used for swimming or bathing and is operated by an owner, lessee, operator, licensee, or concessionaire, regardless of whether a fee is charged for use. Public pools include pools installed in private settings, such as multifamily residential buildings or hotels that are available exclusively for use by tenants or guests.
POOL PUMP, DEDICATED-PURPOSE refers to a category of pumps designed specifically for various pool related functions. This includes self-priming pool filter pumps, non-self-priming pool filter pumps, waterfall pumps, pressure cleaner booster pumps, integral sand-filter pool pumps, integral-cartridge filter pool pumps, storable electric spa pumps, and rigid electric spa pumps, as defined by 20 CCR §1602(g)(4).
2025 CALIFORNIA ENERGY CODE 29
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
ALL OCCUPANCIES—GENERAL PROVISIONS
POOLS are any structures or products intended for swimming, bathing or wading; designed and manufactured to be connected to a circulation system; and not intended to be drained and filled with each use. This includes, but is not limited to, in-ground, aboveground and on-ground pools; and wading pools.
POOLS, AUXILIARY POOL LOADS are features or devices that circulate pool water in addition to that required for pool filtration, including, but not limited to, solar pool heating systems, filter backwashing, pool cleaners, waterfalls, fountains and spas.
§ 209.2.4 Medium relevance — show source text
- When all areas served by the controlled lighting are receiving daylight illuminance levels greater than 150 percent of the illuminance from controlled lighting when no daylight is available, the controlled lighting power consumption shall be no greater than 35 percent of the rated power of the controlled lighting.
A6.209.2.4 Shut-off controls.
A6.209.2.4.1 In addition to the manual controls installed to comply with Sections A6.209.2.1 and A6.209.2.2 for every floor, all indoor lighting systems shall be equipped with separate automatic controls to shut off the lighting. These automatic controls shall meet the requirements of Section A6.209.1and may be an occupant sensor, automatic time switch or other device capable of automatically shutting off the lighting.
Exceptions:
- Where the lighting system is serving an area that must be continuously lit, 24 hours per day/365 days per year.
- Lighting in corridors, guestrooms, dwelling units of high-rise residential buildings and hotel/motels and parking
garages. 3. Up to 0.3 watts per square foot of lighting in any area within a building that must be continuously illuminated for reasons of building security or emergency egress, provided that the area is designated a security or emergency egress area on the plans and specifications submitted to the enforcement agency under Section 10-103(a)2 of Title 24, Part 1.
A6.209.2.4.2 If an automatic control device is installed to comply with Section A6.209.2.4.1, it shall incorporate an override switching device that:
- Is readily accessible; and
- Is located so that a person using the device can see the lights or the area controlled by that switch or so that the area being lit is annunciated; and
APPENDIX A6.1-26 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]
- Is manually operated; and
- Allows the lighting to remain on for no more than 2 hours when an override is initiated; and Exception: In malls, auditoriums, single tenant retail spaces, industrial facilities and arenas, where captive-key override is utilized, override time may exceed 2 hours.
- Controls an area enclosed by ceiling height partitions not exceeding 5,000 square feet. Exception: In malls, auditoriums, single tenant retail spaces, industrial facilities, convention centers and arenas, the area controlled may not exceed 20,000 square feet.
A6.209.2.4.3 If an automatic time switch control device is installed to comply with Section A6.209.2.4.1, it shall incorporate an automatic holiday “shut-off” feature that turns off all loads for at least 24 hours and then resumes the normally scheduled operation.
Exception: Retail stores and associated malls, restaurants, grocery stores, churches and theaters.
A6.209.2.4.4 Offices 250 square feet or smaller; multipurpose rooms of less than 1,000 square feet and classrooms and conference rooms of any size, shall be equipped with occupant sensor(s) to shut off the lighting. In addition, controls shall be provided that allow the lights to be manually shut off in accordance with Section A6.209.2.1 regardless of the sensor status.
Frequently asked questions
How do I find my site's Lighting Zone?
Lighting Zones are set in § 10‑114 of Title 24, Part 1 and may be adopted or amended by local jurisdictions per the same section. Check § 10‑114 and any local ordinance before doing the AWA calculation.
Where are the numeric W/ft² AWA values?
Numeric AWAs are in Table A6.209.4‑A (Appendix) and Table 140.7‑A (Part 6). Those specific numeric tables were not included in the retrieved files here; pull the official table from the code to get the exact W/ft² values used in the multiplication step. See § A6.209.4.4.1.1.
Can I trade outdoor lighting allowances to indoor lighting?
No. Trading of lighting power allowances between outdoor and indoor areas is not permitted under the code. See § 170.2(e)6B and related appendix rules.
What if my local ordinance requires brighter lighting?
If the local ordinance meets the Part‑1 criteria, the code allows a local‑ordinance additional allowance limited by the code table; you must use the smaller of the table allowance or the actual installed power that satisfies the ordinance. See § A6.209.4.4.3.
Do luminaire controls and shielding still apply if I meet the wattage limit?
Yes. Meeting the Allowed Outdoor Lighting Power does not exempt you from mandatory luminaire shielding (BUG), photocontrols, automatic scheduling, or other equipment/control requirements in Part 6. See § 130.2 and the Part 6 control sections.
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