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LED Offers Long Life, and Lower Energy Costs LEDs offer substantial energy savings compared to high intensity discharge (HID) and other traditional lighting systems
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HID lamp: Source efficiency is typically 120 lumens/watt or higher. However, losses from trapped light, protective covers and lenses, inefficient ballasts and unfavorable operating temperature typically result in a measured system efficiency of 30 lumens/watt or less.
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LEDs: Source efficiency can be 100 lumens/watt or higher, depending on the type and manufacturer of the LED used.
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There are no losses from trapped light due to the focused output of the LED, and secondary optics and protective covers generally reduce output by only 25% or less.
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LED power drivers are also more generally efficient than HID ballasts, and reduce system efficiency by 10-15%. However, even when efficiency reductions due to high operating temperatures are included, LED system efficiency often remains above 50 lumens/watt or higher.
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The 35,000 to 50,000-hour bulb life of LED compare to 1000 hour incandescent or 2000-hour halogen.
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Implementing an LED replacement program should result in a 50% reduction in annual energy use (kWh) costs.
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The quality of the illumination — better color rendering — can be achieved with LED’s
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Lighting equates to 12% of global grid based electricity consumption 50% – 70% expected energy saving with LED lighting
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Municipality lighting from street lights and park lighting accounts for 40% of the electricity bill of local municipality.
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LED lamps can reduce up to 50% of CO2 emission 50,000 Hours of the expected life of an LED, will reduce the cost of maintenance.
