I use it in a micro grow with excellent results..however at first I had some heat issues because of the size..

The bulb i bought was 44.99 online somewhere (don't remember, sorry)..back to the heat.. I tried multiple scenarios with 3 computer fans I have..I found having two exhaust behind the socket part with one intake on the opposite end of the cab achieved the best results.. I now average 72-79 degree temps with the lights on..

I also found the cab works better by putting it in a room with a lower ambient temp (68*-72*) ...it was just too hot in my living room where the heat cranks..

Heres a 125watt similar that produced great results... (albeit he did not have much of a cooling system or even a thermometer!)
http://boards.cannabis.com/grow-log/...berate-me.html :thumbsup: