hps cooling

alright im thinking about well im going to be buying a 250 or 400 watt hps , going to be in a 4x4 grow tent, i am wanting to no what all i would have to get to make sure its cool, its about 60 in the room without lights, how much will it increase with a 400 watt hps

sumthin like this will do it
http://cgi.ebay.co.uk/EXTRACTOR-FAN-and-CARBON-FILTER-4-HYDROPONICS-fit-grow-/380211347160?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item58865cbed8#ht_1479wt_784
i work with a 4x4 x 6.5 tent and thats all i use, in the middle of summer u may need sumthin a bit stronger although it also depends where about you live anyway. its fuckin freezing where i am.

Gonna need a cool tube at least.....I've got a 3x3 with a 400w hps cooltube, 4" vortex sucking air through it ....I keep another 4" vortex blowing into the tent at the same rate the exhaust is running....usually 25-40% on.....itake is ducted to blow onto the outside of the cooltube.....I can pull down to 72-73 if I wish but usually try to keep it at 79-80.....proper use of fans for intake and exhaust is a must for an enclosed space. Good luck.........

Difficult to say but my Son-t Pia plus gives off next to no heat- i kind of wished it would as my temps are freezing outside. To give you an idea its -3 outside and on top of my HPS ive had to add a small heater to my tent ( which sits in garage) in order to get the temp above 12 degrees C. I had the opposing problem last time with a cheaper HPS. SO perhaps by going for an expensive bulb that has lower heat radiation such as the one im using, it may possibly save you from having to buy additional stuff to combat heat problems. Just an idea from my own personal experience but other factors like the effectiveness of your inlet and exhaust fans may alter your temps anyway?