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    Anybody tried to dim their Mh's

    Hello All, Has anybody had any experiance with dimming their Metal Halide systems? I have ARO electronic ballasts and ushio 10,000 k bulbs 250w's. I want to dim them to about the same level of 175's..... I beleive the 2 250's i have are too much for my 72g bow. Plus it heats up the room i have...
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