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| HID lights installed on a fuel island at a Marathon Gas Station in northern Michigan. |
High-Intensity Discharge (HID) Lighting Systems
Due to their intensity, HID lighting systems are useful for lighting large areas from high ceilings, and range from 50 to 2,000 watts each. Older HID installations are often mercury vapor lamps, an extremely inefficient design. Like fluorescent lamps,HID systems have ballasts, and systems built before 1978 may contain potentially harmful substances such as PCBs (Polychlorinated biphenyls).
HID lamps are commonly used in the following applications:
- Garages
- Warehouses
- Areas with high ceilings
- Exterior safety and security lighting
- Accent lighting
