The Advantages of LED Lighting

Long life – lifetimes can exceed 100,000 hours, as compared to 1,000 hours for tungsten bulbs

Robustness – no moving parts, no glass

Size – typical package is only 5 mm in diameter

Energy efficiency – up to 90% less energy used translates into smaller power supply required

Non-toxicity – no mercury

Versatility – available in a variety of colors

Cool – less heat radiation than HID or incandescent

blue red green LEDs

LED billboard sign

Electric Lighting Consumption

 

Electricity Consumption Chart

Lighting is the single biggest user of electricity

  • Incandescent Light Bulb – 1-4% efficient
  • Fluorescent – 15-25% efficient
  • LED - 20-52% efficient (60-80% theoretical)

* "DOE Solid State Lighting Status and Future" SPIE Annual Meeting 2004
**J. R. Brodrick, "DOE Solid State Lighting Status and Future" Report for Dept. of Energy

Global Warming / Energy Savings Potential

The Earth's Lights at Night - Photo Courtesy of Nasa; Supplied by Jeff Tsao of Sandia National Laboratories

If a 150 lm/Watt Solid State LED source were developed, then in the United States alone we would:

  • Realize $115 Billion cumulative savings by 2025*
  • Alleviate the need for 133 new power stations*
  • Eliminate 258 million metric tons of carbon*
  • Save 273 TWh/year in energy**

* "The Promise of Solid State Lighting" OIDA Report , 2001
**A. D. Little, "Energy Savings Potential of SSL" Report for Dept. of Energy

© 2006-2007 SSLDC, College of Engineering, UCSB

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