NOTE: This definition was changed in RP-16-17 Addendum 2. Deletions have a strike-through. New text is bold.
A measure of daylight illuminance sufficiency for a given area, reporting a percentage of floor area that exceeds a specified illuminance (e.g., 300 lux) for a specified percentage of the analysis period.*
An annual daylighting metric that quantifies the fraction of the area within a space for which the daylight autonomy exceeds a specified value.« Back to Definitions Index