With T 12 you can almost touch the plants.
75 at least in my house would be a pipe dream without some serious airflow.
Mostly because I put reflective sides on the contraption.'
But it really is hard to explain what I or other people do with words.
I went to 100 watt CFL lights spaced in about a 1 foot grid on a homemade frame.
12 of them.
4 in each row of three.
Paper plate reflectors above each bulb.
Total current draw 2.7 amps at 324 watts of actual power consumption.
Which allowed me to put 1,200 watts of energy in a 3x4 space.
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