anyone know if a 4 inch budget extractor fan will cool a 600 in a 5 inch cooltube, yeah i said i was gonna get a hood, but i realy need to get moving with this, getting a cooltube for 30 quid, use it in the 250 for 2 weeks, then should be able to get my 600 ballast, then if this 4 inch extractor works, i can run that until i can get me a decent extractor, all this budget shit is a waste of money, i advise if any noob gonna get filter, fan, etc get the real deal, known names etc you fuckin buy the cheap shit, and end out needing the real good stuff anyway ffs