mh bulb

Can i put a one hundred watt mh bulb in a heat lamp fixture that supports two hundred and fifty watts

Aslong as you don't try and power it off a 250 watt ballast, you'll blow the bulb. My reflector takes 1000watt but my bulb and ballast are only rated to 600w.

100w bulb to 100w ballast. 250w bulb to 250w ballast. If the fixture has a built in ballast the answer is no. You will blow the bulb.

Damn I have unlimited access to free 100-175 watt hd bulbs from work.

Could you send me some 150's lol.