Tuesday, March 29, 2011

Program: LED and Inductive Lighting
Speaker:  Nick Chintila, National Utility Sales Manager, GE Lighting Systems, Inc. 

Highlights of presentation:

  • LED lighting is not really ready for home or office use due to color of light
  • LEDs are applicable for outdoor lighting.
  • LED lighting accounts for about 20% of the energy used in the US, outdoor lighting is 1%.
  • LEDs currently donít improve overall lumens/watt, but are much more efficient in putting the light where you want it, and not anywhere else.
  • In parking lots, where presently mercury arc or sodium lamps put light in a gaussian distribution leaving dark areas between lamps, and letting a lot of light go where it isnít needed, LED lighting gives an almost totally uniform illumination with less total watts used and reduced maintenance.
  • LEDs are much more efficient than CFL and incandescent, and about the same as halide metal, but will be more efficient in about 2-3 years.
  • LEDs wear out slowly, not a sudden death like incandescent.
  • LEDs last a very long time, 10-12 years; the circuits may not last that long.
  • LED color can be modified to a soft white, but this takes a bit hit on efficiency.
  • LEDs were first used in the Apollo space missions in readout displays due to their ruggedness. They were the red color types.
  • The next big application was traffic lights-green/blue. The failing LEDs you see are due to the age of the circuits; the LEDs themselves are probably OK.
  • Inductive lighting is even more efficient, but more expensive and less developed at present. 

Some challenges:

  • Need to convert from AC to DC.
  • Big power surges are a problem, more work on protection circuits is needed. 

More Information:

LED 2011 Presentation (pdf, 3,631 KB)

Street Lighting Comparison IND HPS LED 2152011 (pdf, 966 KB)