I have used plexi glass but it is not as clear as regular glass. It is easy to cut sure but if a bulb was to explode would it burn? I would get plexi glass because it is easier to cut and at present I'm broke, but it is not the best way to go. I don't vent my lights I insulate my hood so no heat excapes. Make them air tight and use a/c to control temp. Thats just me. I have read in other posts the like a 265 cfm is the way to go for a 400 watt, but Zandor would really know alot more then me.

Whats the average temp in the room?
How big is the grow space?
karmaxul Reviewed by karmaxul on . Zandor, Karmaxul, exhaust fan advice? Ok, spring is definitely here and it's time to vent my light outside. I've got a sunleaves reflector and I need to mount a fan that I can easily duct outside and easily mount to the hood. What can you recommend that the Home Depot carries? I'm hoping for something that won't take too much messing around to get it working. Also, Is it worth while to put either some plex or glass over the light to help with heat transfer? Would plexi glass work, or would it melt under a 400 watter? Rating: 5