Yeah, seal the light from thgrow space. There are other threads that discuss the effects of the glass on the light, and it seems to be none or very minimal. Also, i have heard of others having good results controlling heat with the design.

Also, i'm sure you were planning on venting the light space up and out the two holes you will be making on the top of the cab. and maybe using the other 4 on the sides as passive.

That thing looks great. A friend just made one, here, here's the link:

Cabinet
dusto2k3 Reviewed by dusto2k3 on . building a birthday box and i need help suggestions there is the idea so far .... any reason i shouldnt do this brown is reinforcement 1x2 green is the 400watt enclosed lowbay hps red is wood removed from the cabinet would 5inch holes be enuff for cooling or should i use less holes and an inline air pump if i should go with active cooling how many cfm should i have total pullin air outta the vent Rating: 5