I tested it some more and found the T8 ballast works pretty good in a fully enclosed fixture.
The ballast draws right about 1 amp, or 120 volt-amps, obviously sending up to 40w to each tube.
This cuts the cost of making 2 of my multi function fixtures in half.
I'm liking the multi function fixtures since four full power 54w tubes as your only option is a bit much most of the time.
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