heat management

[barney]

hey, i'm retooling my grow to the led set-up. my questions are. how much heat can I expect? i'm trying to decide if I can do a 4" or I can do 6" if necessary. I will be using two 4x4 tents. w/ 1 960w led in each tent. also, does anyone make a tent kit that has the capability of climate control? e/I a variable speed fan on a thermostat? thanks for any input.

[Iammygod]

All lights produce 10-25% of electric energy as light and the rest as heat. Light that have not been utilized in photosynthesis will convert to heat.

[Toker1]

3,273.6 btu/hr from 960w (assuming that actual draw from the source). Go with 6” fan.