[10.5.9.10] useful daylight illuminance (UDI)
The fraction of time across a daylighting study period where the illuminance at a point lies between selected minimum and maximum levels (typically 100 and 3,000 lux).
[10.5.9.10] useful daylight illuminance (UDI)
The fraction of time across a daylighting study period where the illuminance at a point lies between selected minimum and maximum levels (typically 100 and 3,000 lux).