Forgot about the Venture ballast. It has a rated power factor of .9 drawing 4.55 amps
http://www.venturelighting.com/Balla...ame%20Page.htm
In order of efficiency we have
Magnatek/Universal 4.3 amps power factor unknown
Venture 4.55 amps 0.9 power factor
Advance 5.3 amps 0.8 power factor.
I guess the power factor of the Magnatek exceeds 0.9 which i didn't think was possible with HID ballasts. Hmm
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Originally Posted by StirCrazy
Bryan, My guess would be that the power factor on the magnateck is 0.9 which would account for the differences..
Steve
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