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LED Advantages

 
  • Lower energy consumption and higher efficiency: Solid-state lighting (SSL) technology including LED and OLED has the potential to cut U.S. lighting energy usage by one-quarter and contribute significantly to global climate change solutions.
  • Longer lifetime: LED useful life is typically based on the number of operating hours until the LED is emitting 70 percent of its initial light output. Good-quality white LEDs in well-designed fixtures are expected to have a useful life of 30,000 to 50,000 hours. A typical incandescent lamp lasts about 1,000 hours. A comparable CFL lasts 8,000 to 10,000 hours, and the best linear fluorescent lamps can last more than 30,000 hours
  • Shock resistance: LEDs, being solid state components, are difficult to damage with external shock.
  • Compact in size: LEDs are often small in area (less than 1 mm2)
  • Fast On/Off switch: LEDs light up very quickly with fast switch. The use in brakes improves safety, due to a great reduction in the time needed to light fully, or faster rise time, up to 0.5 second faster than an incandescent bulb.
  • More colors on its own: LEDs can emit light of an intended color without using any color filters
  • Cool light: LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. It only disperses heat on base
  • Good focus: The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner.

                                 
  

Typical LED Efficacy Compared to Conventional Lighting Technologies in 2010

 (Source: 2011 DOE SSL Multi-Year Program Plan)

Product Type

Typical Luminous Efficacy (lm/W)

Life (hrs)

Price

LED cool white package

130

50K

$50    per kilolumen

LED warm white package

93

50K

 Compact fluorescent lamp

 63

 12K

$10    per kilolumen

Incandescent

15

1K

$0.5   per kilolumen

 
 

* Reference: http://en.wikipedia.org/wiki/Light-emitting_diode, http://www1.eere.energy.gov/buildings/ssl/ 
 


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