Which individual occupant lighting control meets the requirements of Indoor Environmental Quality Credit, Interior Lighting?
Correct Answer: B
The Indoor Environmental Quality Credit, Interior Lighting, requires the project team to provide individual occupant lighting control for at least 90% of the individual occupant spaces, or at least 50% of the shared multi-occupant spaces. The lighting control must enable occupants to adjust the lighting to suit their individual tasks and preferences, and must have at least three lighting levels, excluding off1. Therefore, a three level (on, 25%, off) lighting control meets the requirements of this credit, while a two level (on, off) lighting control does not. A three level (on, 50%, off) or a three level (on, 75%, off) lighting control may also meet the requirements, depending on the lighting power density and the daylight availability in the space2.
References:
*LEED v4 Reference Guide for Building Design and Construction, Indoor Environmental Quality Credit:
Interior Lighting, page 7071
*Interior lighting | U.S. Green Building Council3