yes its a 400 watter. i never installed the glass because i have my incoming air built into the reflector so it not only cools the bulb but pours fresh air right onto my plants. my outgoing air in also installed on the reflector taking heat away. with my fan on the temp under the light is warm, not hot. also i juuuuuust raised my light b4 i took those pics so the light was even lower. i thought they were small as well and i wanted them to strech a bit as well so i raised it an inch lol. now that i think about it i should prob raise it a few more.