High Intensity Discharge-
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Pressure Sodium lamps are known for high efficiency, long life and
reliability. High Pressure Sodium lamps have significantly reduced
amounts of Mercury and Lead, making them environmentally friendlier
sodium lamps, producing up to 180 lumens per watt, have the highest
efficacy of all commercially available lighting sources. With a CRI
of 0, low pressure sodium lamps are used where color rendition is not
important but energy efficiency is. They're commonly used for
outdoor, roadway, parking lot, and pathway lighting.
Vapor lamps are designed primarily for use in general lighting
applications where good efficiency and long life are needed and color
rendering requirements are moderate. Having an average rated lamp
life of 24,000 hours means reduced maintenance and replacement costs,
translating into additional energy savings by reducing the number of
lighting fixtures needed per installation.
Halide lamps represent some of the most efficient, long life light
sources currently available and provide three to ten times as many lumens
per watt as incandescent lamps. Metal Halide products are known for
their color control.