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LED lighting

Merry Christmas
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tribe

New member
Location
Oregon
I'm Looking for information on high intesity LED lighting such as area lighting. Has any one worked with this style of lighting what are its capabilities? I worked for Eastman Kodak several years ago they had LED lighting. Several of the old timmers said most of their lighting has been in for over 20 years with out replacing bulbs. Wow! I spent three years there and never touched a bulb. I know some cities are using LED's in their street lamps.
I'm looking to replace some area lighting and was woundering if any one has worked with some of the newer LED lighting (High Intensity) I'm seeing bulbs on line with 100,000 hrs life expectancy and can be used in place of metal hallide, mercury vapor etc..
This shows a lot of promise but I question some of the claims. Any Information would be greatly appreciated. Thank You :-?
 
boater bill

boater bill

Senior Member
Location
Cape Coral, Fl.
Room lighting is as high of output as I have seen as of yet with LED's. Outdoor applications such as step lights or signs have been out for a while but something that would have the lumen output of a 400 watt Metal halide would probably have a heat sink too big to be practical.
 
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winnie

Senior Member
Location
Springfield, MA, USA
Occupation
Electric motor research
You won't find 20 year old _white_ area lighting. Someone might have been experimenting with it 20 years ago, and red or amber LED safelights might have been around (in fact I remember a little hang on my neck battery powered LED safelight from 1986 or so), but blue and white LEDs did not enter the general marketplace until the mid-late 1990's.

White LEDs have only recently (in the past 3-5 years) reached the point of being able to compete on efficiency with halogen lights, and are now advancing _very_ rapidly; lab results for white LED efficiency now exceed fluorescent lamp efficiency. But don't expect this in the supply chain for several years yet.

LEDs are notoriously heat sensitive. The most efficient LED tested in a lab still converts 50% of its input electricity to heat, and this heat must be removed from the semiconductor. Real LEDs that you can buy today will convert some 70-80% of their input electricity to heat.

-Jon
 
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