Good lighting

Selecting a lighting system isn’t always an easy decision. Facility managers must first consider the appropriate design for the area to be illuminated and the light levels recommended by the Illuminating Engineering Society (IES), and then select an efficient light source and fixture.The high indoor spaces typical of warehouses and factories have traditionally been dominated by high-intensity discharge (HID) light sources. More recently, improved fluorescent lamps and high-intensity fluorescent fixtures have made fluorescent lighting the more cost-effective alternative. Additionally, fluorescent lights are easier to control using occupancy sensors. Motion sensors make particular sense in areas with intermittent occupancy, such as warehouses.There’s more to upgrading a lighting system than just swapping out a lamp. Lighting efficiency depends not only on the lamp but the fixture itself. “A fluorescent lamp at 95 initial lumens per watt is very efficient unless the fixture only allows 50% of the light out of it,” according to Peter Morante, director of energy programs at The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute.

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