T5's vs HPS

My grow box is 38x55 vented with a 4" ext, and 4" intake for circulation, along with a fan inside to move the air around. Currently using (2) 3ft T5's 6500K for right now, cause they are still babys. Im trying to decide if I need more blue light and if I should buy (4) 2ft T5's 3000K for flowering or should I just get a 250 or 400 Watt HPS system? I just dont want a heat issue? Small box LoL. Anyone else run into this issue?

My 400w give off really no heat whatsoever even if i turn the fans off

you would be way better off with a 400, or even a 250 with a few of those t5's for side light, if you air cool the hood with the 4" exhaust you already have then it would give off no more heat than the setup you have now, i just picked up a few 2' t5's for a clone room in my closet and those little fuckers kick out a bit of heat

orange fluoros for flowering ... white for vegging .. i got 6 orange and two white in a 2x4x2 , 420 w 40 000 lumens controlled in a small box is optimum

i do both, got fluoros a 400 and 1000, quality is far better in the box with the fluoros , easier to control heat, even light distribution

a 400 watt and 1000watt Hps?