Luminaires & Distribution
Last Update: October 30, 2010
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Exterior Retrofits

Owners can derive significant benefits in replacing existing outdoor luminaires. Not only can such upgrades improve energy efficiency and thereby reduce owner energy costs, they can generate other benefits such as improved color, light distribution and maintenance. There are many options available to replace older light sources such as mercury vapor, high-pressure sodium (HPS), probe-start metal halide and incandescent/halogen, including LED, plasma, induction and electronic-ballasted HPS and pulse-start and ceramic metal halide systems. All new luminaires should feature optics that not only maximize efficiency and minimize glare but also minimize light emitted upward, which causes skyglow, and light emitted onto neighboring properties, called light trespass. In some cases, such non-energy benefits—e.g., improved performance and reduced light pollution, long service life and improved lumen maintenance, and superior color performance—can drive the upgrade, with energy savings being an important additional, but not the primary, driver.

Full Cutoff Luminaires
The exterior lighting environment may be improved through the replacement of non-cutoff exterior luminaires with full cutoff types. In existing applications already using high efficacy sources with non-cutoff luminaires, the use of full cutoff luminaires may improve the effectiveness of the lighting system through improved uniformity and reduced glare, and by reducing light trespass and light pollution.
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LED Retrofit Kits for Street & Area Lighting
LED retrofit kits are LED luminaires or array-and-driver packages that replace pole-mounted HPS, metal halide, mercury vapor and incandescent outdoor luminaires or lamp-ballast systems for significant energy savings.  LED retrofit kits have the benefits of longer rated life, potentially enhanced lighting quality, lower susceptibility to damage from vandalism, lower likelihood of lamp outage, and no ultraviolet output or mercury or lead in disposal.
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Luminaires & Distribution

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