MadSci Network: Physics

Subject: How is it possible to have White LED's in flashlig

Date: Tue Nov 2 13:58:12 2004
Posted by William
Grade level: grad (science) School: Spokane Community College
City: Spokane State/Province: WA Country: USA
Area of science: Physics
ID: 1099425492.Ph

There are new flashlights available that have hi-intensity WHITE LED's in
them.  LED's are usually monochromatic.
The electronics industry is trying for UV LED's , Blue LED's, etc.

How have they made LED's that have all colors combined [white light]
without a hot filament as in normal light bulbs?

Will incandescent light bulbs for home use ever be replaced by these
white LED's?

What is the efficiency of these LED's and do they get hot?

Do you have any good internet web links describing the physics and
characteristics of these LED's?

Bill Frankart, PhD [Chemistry Instructor]

Re: How is it possible to have White LED's in flashlig

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