stoneslacker
Well-Known Member
I use the lumatek dimmable 250w and love it. If you decide to go with a dimmable ballast I would recommend getting the 400w. With the 400w you are able to run either a 400w bulb or a 250w bulb. The difference in price is fairly small and gives you some flexibility if the 400 runs too hot or you expand and 250w is not enough. I would not recommend underpowering a 400w bulb at 250w though. I tried this with my 250 powered at 150 and it did not seem to be good for the bulb.thanks for the advice what brands of ballast do you recommend