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Credit language
Requirements
Select one or both of the following two options.
Option 1. Lighting control (1 point)
For at least 90% of individual occupant spaces, provide individual lighting controls that enable occupants to adjust the lighting to suit their individual tasks and preferences, with at least three lighting levels or scenes (on, off, midlevel). Midlevel is 30% to 70% of the maximum illumination level (not including daylight contributions).
For all shared multioccupant spaces, meet all of the following requirements.
- Have in place multizone control systems that enable occupants to adjust the lighting to meet group needs and preferences, with at least three lighting levels or scenes (on, off, midlevel).
- Lighting for any presentation or projection wall must be separately controlled.
- Switches or manual controls must be located in the same space as the controlled luminaires. A person operating the controls must have a direct line of sight to the controlled luminaires.
Guest rooms are assumed to have adequate lighting controls and are therefore not included in the credit calculations.
AND/OR
Option 2. Lighting quality (1 point)
Choose four of the following strategies.
- For all regularly occupied spaces, use light fixtures with a luminance of less than 2,500 cd/m2 between 45 and 90 degrees from nadir.
Exceptions include wallwash fixtures properly aimed at walls, as specified by manufacturer’s data, indirect uplighting fixtures, provided there is no view down into these uplights from a regularly occupied space above, and any other specific applications (i.e. adjustable fixtures).
- For the entire project, use light sources with a CRI of 80 or higher. Exceptions include lamps or fixtures specifically designed to provide colored lighting for effect, site lighting, or other special use.
- For 75% of the total connected lighting load, use light sources that have a rated life (or L70 for LED sources) of at least 24,000 hours (at 3-hour per start, if applicable).
- Use direct-only overhead lighting for 25% or less of the total connected lighting load for all regularly occupied spaces.
- For 90% of the regularly occupied floor area, meet the following thresholds for area-weighted average surface reflectance: 85% for ceilings, 60% for walls, and 25% for floors.
- If furniture is included in the scope of work, select furniture finishes to meet the following thresholds for area-weighted average surface reflectance: 45% for work surfaces, and 50% for movable partitions.
- For 75% of the regularly occupied floor area, meet ratio of average wall surface illuminance (excluding fenestration) to average work plane (or surface, if defined) illuminance that does not exceed 1:10. Must also meet strategy E, strategy F, or demonstrate area-weighted surface reflectance of 60% for walls.
- For 75% of the regularly occupied floor area, meet ratio of average ceiling illuminance (excluding fenestration) to work surface illuminance that does not exceed 1:10. Must also meet strategy E, strategy F, or demonstrate area-weighted surface reflectance of 85% for ceilings.
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Cost estimates for this credit
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Frequently asked questions
Where do I find the CRI of a lamp?
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Do task lights need to meet all the lighting quality requirements?
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How limiting are the reflectance values in the finish requirements?
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Daylight is an important strategy in my project. How do I meet this credit as well as the daylighting credit?
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Do operable shades count as lighting controls?
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Does having multi-circuit lighting count as providing multiple lighting levels?
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How do I calculate an illuminance ratio?
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Is Option 1 achievable for open office spaces?
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What lighting controls are required for a conference room with a presentation screen?
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Can I use recessed fixtures and still meet Strategy D?
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For Option 1, we would like occupants to be able to control lighting in their area from smartphones, tablets, or computers; we plan to eliminate physical switches altogether. Would this meet the intent of Option 1?
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Addenda
7/29/2022 – Updated: 9/1/2022
Reference Guide Correction
Description of change: Under Indoor Environmental Quality Overview, Tricky Spaces:
Add a new section as follows:
"Museums
• Exceptions to Interior Lighting, Daylight, and Quality Views are permitted. See the Further Explanation, Project Type Variations sections in Interior Lighting, Daylight, and Quality Views."
Under Interior Lighting, Further Explanation, Project Type Variations
Add a new section as follows:
"Museums
• Museum exhibit and other collection spaces may be excluded from the interior lighting requirements."
Under Daylight, Further Explanation, Project Type Variations
Add a new section as follows:
"Museums
• Museum exhibit and other collection spaces may be excluded from the daylight requirements."
Under Quality Views, Further Explanation, Project Type Variations
Add a new section as follows:
"Museums
• Museum exhibit and other collection spaces may be excluded from the views requirements."
Internationally Applicable: No
10/1/2014 – Updated: 2/14/2015
Rating System Correction
Description of change: Revise Option 2, strategy H so it reads: For at least 75% of the regularly occupied floor area, meet a ratio of average ceiling
illuminance (excluding fenestration) to work surface
illuminance that does not exceed 1:10. Must also meet strategy E, strategy F, or demonstrate area-weighted surface reflectance of at least 85% for ceilings.
Internationally Applicable: Yes
10/1/2014 – Updated: 2/14/2015
Form Update
Description of change: Revised summary for C. Lamp Life from "Connected lighting load with rated life greater than 24,000 hours (or L70 for LED sources)" to "Connected lighting load with rated life of at least 24,000 hours (or L70 for LED sources)"
Revised errors in the ratio calculations for G. Surface Illuminance Ratio: Wall to Work Surface and H. Surface Illuminance Ratio: Ceiling to Work Surface
Internationally Applicable: No
10/1/2014 – Updated: 2/14/2015
Reference Guide Correction
Description of change: Revise Option 2, strategy H so it reads: For at least 75% of the regularly occupied floor area, meet a ratio of average ceiling
illuminance (excluding fenestration) to work surface
illuminance that does not exceed 1:10. Must also meet strategy E, strategy F, or demonstrate area-weighted surface reflectance of at least 85% for ceilings.
Internationally Applicable: Yes
7/1/2014 – Updated: 2/14/2015
Reference Guide Correction
Description of change: Table 1, modify item D so it reads "25% connected lighting load for regularly occupied spaces."
Internationally Applicable: No
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