The primary appeal of LED street lighting is energy efficiency compared to incandescent bulbs of the same luminance. Research continues to improve the efficiency of newer models. One such advance can be found in a street light product created by Lighting Science Group. One model of LED street lights produced by this group is up to 60 percent more efficient than previous models, lasts for 12 years, and allows for cost recovery through energy savings in only three years. [1]
An LED street light based on a 901 milliwatt output LED can normally produce the same amount of (or higher) luminance as a traditional light, but requires only half of the power consumption.
As the LED lighting fixtures normally produce less lumen/Watt illumination it is very crucial to have a well distributed illumination pattern in order to do the same job as higher lumen/Watt conventional fixtures. So a good design of LED street lights is to point different LEDs in one fixture to different target points.
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