LOL no u wont blow teh bulb ,, that will only happn if the bulb exceeds the watt ratio for teh ballast ,,,, ... so YES u will be fine ,, a 600 watt ballast is capable of handling a 600w bulb ,, so a 250 W bulb aint shyt for that ballast

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everything i say is false . i am actully a polar bear that now resides in a treetop casino somwhere out in the pacific ocean