Mercury Vapor Lamps
Mercury vapor lamps—the oldest types of high-intensity discharge lighting—are used primarily for street lighting.
Mercury vapor lamps provide about 50 lumens per watt. They cast a very cool blue/green white light. Most indoor mercury vapor lamps in arenas and gymnasiums have been replaced by metal halide lamps. Metal halide lamps have better color rendering> and a higher efficacy. However, like high-pressure sodium lamps, mercury vapor lamps have longer lifetimes (16,000–24,000 hours) than metal halide lamps.
Significant energy savings are also possible by replacing old mercury vapor lamps with newer high-pressure sodium lamps.
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Product Information
National Lighting Product Information Program
Lighting Research Center - Rensselaer Polytechnic Institute
