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Originally Posted by BrainVat
For the same brand of bulb, HQI does put out more light per watt, and conversely generates less heat per watt. I've been told that this is a feature of bulb design, and has to do with the fact that current passes over the bulb coils in a single direction without having to be looped back like in a mogul. The end result is less resistance at the bulb and higher output.
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Sorry you were lied to. I though that also but then I tested the output of my HQI driven SE 10000K AB set up against Sams HQI DE 10000K AB and even with the reflectors on I got a higher PAR output from my set up, this got me thinking.
Steve
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