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#2
January 31st 08, 09:15 PM
posted to rec.aviation.homebuilt
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Landing Light bulbs
Jerry Wass wrote:
Why does the diameter of the reflector have so much effect on the output-(candlepower)--of bulbs having the same power input?? i.e. #4509-PAR-36 4.45"Ø 110,000cp #4537-PAR-46 5.70"Ø 200,000cp The reflecting area is larger. 15.55 in^2 compared to 25.51 in^2 
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