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Kera Lagios
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SPECIAL REPORT
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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To promote occupants’ productivity, comfort, and well-being by providing high-quality lighting.
Requirements
Meet 1 strategy for 1 point. Meet 3 strategies total for 2 points.
1. Glare Control
For all regularly occupied spaces, meet one of the following requirements:
- Use light fixtures with a luminance of less than 7,000 candela per square meter (cd/m)2 between 45 and 90 degrees from nadir. OR
- Achieve a Unified Glare Rating (UGR) rating of
2. Color Rendering
For all regularly occupied spaces meet one of the following requirements:
- Use light sources that have a Color Rendering Index (CRI) of at least 90.
- Use light sources that have a Color Fidelity Index greater than or equal to 78 and a gamut index between 97 and 110, determined in accordance with Illuminating Engineering Society (IES) TM-30.
3. Lighting Control
Provide dimmable or multilevel lighting for 90% of occupant spaces.
4. Surface Reflectivity
For at least 90% regularly occupied spaces, use interior finishes with a surface reflectance greater or equal to 80% for ceilings and 55% for walls. If included in the project scope, use furniture finishes with a surface reflectance greater or equal to 45% for work surfaces and 50% for movable partitions.
India ACP: Interior Lighting
I. Projects in India may, in all regularly occupied spaces, meet or exceed the lower illuminance levels listed in the Bureau of Indian Standards (BIS) code -- IS 3646 (Part 1): 1992, Table 1- Recommended Illumination. See all forum discussions about this credit »What does it cost?
Cost estimates for this credit
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Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
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© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To promote occupants’ productivity, comfort, and well-being by providing high-quality lighting.
Requirements
Meet 1 strategy for 1 point. Meet 3 strategies total for 2 points.
1. Glare Control
For all regularly occupied spaces, meet one of the following requirements:
- Use light fixtures with a luminance of less than 7,000 candela per square meter (cd/m)2 between 45 and 90 degrees from nadir. OR
- Achieve a Unified Glare Rating (UGR) rating of
2. Color Rendering
For all regularly occupied spaces meet one of the following requirements:
- Use light sources that have a Color Rendering Index (CRI) of at least 90.
- Use light sources that have a Color Fidelity Index greater than or equal to 78 and a gamut index between 97 and 110, determined in accordance with Illuminating Engineering Society (IES) TM-30.
3. Lighting Control
Provide dimmable or multilevel lighting for 90% of occupant spaces.
4. Surface Reflectivity
For at least 90% regularly occupied spaces, use interior finishes with a surface reflectance greater or equal to 80% for ceilings and 55% for walls. If included in the project scope, use furniture finishes with a surface reflectance greater or equal to 45% for work surfaces and 50% for movable partitions.
India ACP: Interior Lighting
I. Projects in India may, in all regularly occupied spaces, meet or exceed the lower illuminance levels listed in the Bureau of Indian Standards (BIS) code -- IS 3646 (Part 1): 1992, Table 1- Recommended Illumination.LEEDuser expert
Kera Lagios
M.Arch, LEED AP BD+C, Assoc. IALD
atelier fos
Founder
