Looks pretty good :thumbsup:

Is that tin foil? Big No-No with an hps. Get some flat white paint instead.

What kind of fans are you using? And how are they setup? CFMs? The most efficient would be to have the cooltube fan pulling air through the cooltube, and exhaust fan is pulling air through the carbon filter (so the filter would have to be inside the box).

If that doesn't help with the temps, you need a bigger carbon filter and maybe a new exhaust fan.

Also, I didn't see where your intake was... active or passive?