Switching mid grow

Due to so many heat issues I might just switch mid grow to the 135w led and hit the local store and grand another. Or should I just use both im in a 2x2x5.5 runnina a 150w hps going to set up a passive intake with a co2 filter and inline fan for exhuast. Any input on how else to lower temps? Or set up a good ventaliation without taking to much headroom

use both !..ive used this combo and it works awsome for small grows, also upgrade your fan, a 150 hps puts out very little heat , if your fans cant keep up with that then they(plants) prob oxygen starved and u gonna get humidity issues ,possibly leading to mold.

Damn I get better fan on the 20 with some other stuff. Just gotta figure out how to hook up a 4in inline fan with filter to a 6in port.. And mount the fan in or outside idk tho.