Lighting for parking lots and parking garages will benefit from these controls as well, to insure the lights operate only when needed. Further savings are possible from circuiting the luminaires in logical groups that can be cycled on and off during the night. For example, a multi-level parking garage can leave only one level on during the off hours. This will work especially well for buildings with an integral garage. Such facilities often have only a single access door after close of business, so most parking will be near this entrance anyway.
Parking lots can follow the same method, security needs notwithstanding.
Use separate work station switching Large work spaces with individual work stations separated by partitions are common in laboratories and business offices. When a single person works late the entire space must be lit. An energy efficient alternative is to switch the lights so that one level will provide area lighting, then other switches at each logical work area will activate overhead lighting specific to that area. Maximizing Use of Daylighting Any room with outside windows has daylighting available to supplement the artificial luminaires. Direct light is the least desirable because it can cause problems from glare and it also has the highest contribution to the cooling load for a space.