Thread: How much light is enough?
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Old 08-19-08 | 04:03 PM
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Originally Posted by bmorey
"NLPIP tested several MR16 samples to determine their efficacy. Efficacies ranged from 12 to 15 lumens per watt."

http://www.lrc.rpi.edu/programs/nlpi...erformance.asp

I guess it's case of YMMV.
Reading through the NLPIP stuff and finding some other items, we may be looking at two different measurements with the same units. Efficiency and efficancies are confusing and used confusingly. I'm not sure where Steven M. Scharf got his numbers from and it looks like he just divided the lumen output by the wattage to get some of his numbers. He is an electrical engineer so I assume that what he is doing is valid.

From the standpoint of results (I don't have the equipment to measure lumens but I do have eyes), overvolting certainly does what Scharf says it does. Overvolted MR16 are much brighter than equivalent MR11 lamps and certainly rival...or exceed...HID for light output.
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