250 hps

i was thinking about getting a 250 watt hps and was wondering if i would need to vent or cool,i no i should and will eventualy will but wanna see if i will befor i use it room is about 4 by 4 by 8

Im thinking a 4 by 4 room is going to need at least a 400...and these hps lights get hot and will need some kind of venting...

Yes, even a 150w HPS needs some sort of cooling over the canopy of the plants.