Did you say your max op temp is 40C? Holy guacamole. Up that ventilation! You're looking for about 24-26C.

You know, for $10K, you could build an HPS based grow op (or 10) that would produce like mad and have very little heat signature.
Al B. Fuct Reviewed by Al B. Fuct on . Hi folks! It's been a long time since my last post http://boards.cannabis.com/indoor-growing/96301-what-light-spectrum-curve-absorbed-cannabis.html#post1159985 Finaly I have Assembled my LED lights and now growing using them. Photos comming soon... (tomorrow):thumbsup: Rating: 5