Any street light experts here?

Any street light experts here?
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1 Answer

Answer :

The most efficient lighting sources available today are High Intensity Discharge (HID) and Low-Pressure Sodium (LPS) lamps. With the exception of one HID lamp (mercury vapor) HID and LPS lamps produce the most light per watt of any light source. They create up to one-third less heat and last as much as 24 times longer than incandescents. Despite their advantages, these lamps do have some special considerations. Like fluorescents, they need special ballasts. Mercury Vapor (MV) lamps are most frequently used outside for parking and security lighting. These lamps have a white or blue-white light and limited color rendition, but are still suitable for many outdoor uses. They are the least efficient of the HID lamps (slightly less than fluorescents) and should be replaced with more efficient metal halide or high-pressure sodium lamps when possible.
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