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Old 07-28-09, 01:40 PM   #6
ldjessee
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My understanding is that all of them have different spots where they are most efficient.

And what was a 'prototype' white LED back in 2006 is pretty standard now. So, LED would be up over a 100 and with a lens, you can disperse the light in many different patterns.

I thought metal halide was more like 65-115 lm/W.

Another consideration is quality of light. I do not like the light produced by low pressure sodium fixtures for indoor use.
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