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 Workhorse 7 is a ballast you see for sale. It can run upto four bulbs I think that are t5Ho, PC or VHO. To overdrive all you do is attach all four leads to one bulb(thing its the yellow wire). I tested it by first doing one, then adding another and another and so on. Just to see what the difference is. I have not notice any more heat then normal.  |