NOT True.... window glass will work for even 1000 w bulbs. As long as you have air going them single strength glass is fine. It's better to get double strength glass only for the fact that it takes a beating better then single does by far. Many times with single strength glass when you are changing out a burned out bulb and the glass is still warm it will break while you slide it in or out. The double strength glass is much thicker and stronger and just as easy to find.

But to answer your original question yes even single strength glass will work and you know the down side of it as well.
Zandor Reviewed by Zandor on . Glass for air cooled hood? I would like to find out what type of Glass is to be used for a air cooled hood? I use a 400wt system, and would like to protect the bulb from water when i mist my plants with a sprayer. I am guessing normal glass for a window will prolly not be good enough for the high temps. Cheers, Chef.:) Rating: 5