cab grow lighting

Or how about a 150w hps I know the hid lights run hot but would a 150 w be too much

The 6 and 6 CFLs sound like us be putting out way more watts then just " a t5 and a couple CFLs" so I'd go with ur first selection....I love CFLs for its effectiveness as filler lighting and how easily you can control color temp...but I'm a firm believer that ur main light source should be hid lighting..they make compact applications for them too ..

So I'd be better off with a 150w hps light I'm just concerned about heat inside the box

A good couple of fans would help that ...at times my 5 by 5 tent gets up in the upper 80s with no issues...the heat isnt really the issue...its usually the spike in humidity when ur lights go out. I have a 600w hps a 250w 2700k cfl and a 125w 6500k in that small space lol all I got is a cool tube with a 6 in inline suckin out of tube. .a 4 inch inline pushing in the tent and a 10 fan on a stand inside tent...