I had a 150 watt 8,000 lumen cfl, the u shaped tubes, and the attached ballast burnt out after 2 months. $60 for a new bulb. I personally think it is cheaper to use multiple small watt cfl's 6-23watt cfls=9600 lumens @138 watts need I say more?

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SCREEN OF GREEN #1 with CFL's
Yep, this is just another imaginary garden, created in my mind, representing what I would do if I could grow.