will i run in to veniliation problems

hi i was wondering i have a 3.5x1.5x4.5 i have a 250 watt hps and a 150 watt i wanted to put both together though in the cabinet i have a 4 inch growbright inline fan and one of those 4 inch cheap intake fans will i be able to keep the cabinet cool

Is that 3.5 long 1.5 deep 4.5 tall? If so how to you plan to grow? SOS, SCROG,ect.
Not shur about cfm of growbrite fan. But you have 25 cf of grow area. Need to exchange air every 1-3 minutes so fan needs to be 25 cfm and up.
Why do you what to use both? A 250 hps is enough light for that room that's 47-48 watts per square foot. So heat will be less also. Well hoped this helps.

yeah thats what the cabinet is i was hopin to use both to possibly increase yeild

So what is the cfm of your fan? More then 25 most likely just remember that intake ir is just as in portaint as exhaust. And all should be good. Just keep the room in a negative pressure.