ASHRAE 90.1-2007

Section: 9.4.1.3 - Exterior Lighting Control

Toolbox

Lighting for all exterior applications not exempted in Section 9.1 shall have automatic controls capable of turning off exterior lighting when sufficient daylight is available or when the lighting is not required during nighttime hours. Lighting not designated for dusk-to-dawn operation shall be controlled by either                                           New in 2007

a.       a combination of a photosensor and a time switch or

b.       an astronomical time switch.

Lighting designated for dusk-to-dawn operation shall be controlled by an astronomical time switch or photosensor. All time switches shall be capable of retaining programming and the time setting during loss of power for a period of at least ten hours.

Exceptions:

Lighting for covered vehicle entrances or exits from buildings or parking structures where required for safety, security, or eye adaptation.