theres no easy answer really, depends on more variables than just wattage,

different types of bulb can be warmer or cooler,

also air quality, room size and ambient temps play a roll so the formula would be pretty complicated.

if your using HID;s and can give a room size, it narrows it down a bit
babystarbud Reviewed by babystarbud on . Heat dissapation: How many CFM per Watt? come on theres gotta be a good way to caculat that shit Rating: 5