Quote:
Originally Posted by dmsfrr
The oem tail-light reflectors are shaped to work with a single 'point' source of light, the filament in an incandescent bulb, located at a very specific place within the curve of the reflector.
Nearly all headlight, turn signal and tail-light lenses have shaped surfaces/ridges on the inside that work together with the reflector to provide an applicably shaped field of light.
The light source of an LED replacement tail-light bulb is spread out over the relatively much larger surface of all the LED's, which is why it may not work as well in some older fixtures.
( some of that college tuition money finally paid off) 
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I should say so, throwing around those seventy-five cent college words all over the post...
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- WHY IS IT ... 
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... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag?
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