A 250 watt bulb has almost identical heat issues as a 400 watt bulb..

IN general, it is not worth using HPS bulbs that are under 400watts.

and NOW you KNOWM
Garden Knowm Reviewed by Garden Knowm on . wierd qeustio about heat from a 250w hps in small closet ok would a 250w hps get very hot in a closet about 2 meter high 36inches wide by 33 inches wide? would probably get a extractor soon but u know money probs so how hot would u think itll get? i have a 400w but tis to damn hot to use Rating: 5