Ok, thats what i meant, the new room's dimensions.

You wanna shoot for 5,000 lumens per sq. foot in flower / 3,000 L in Vegg.
That bulbs rated at 14,000 Lumens = just good enough for 3sq. ft. and less.
And yes, Get or make a reflector.

Are your fans pulling or pushing air in and out of the box? Looks like its just swirling hot air around in there. I also use computer fans, and im aircooling my HPS with em. Theyre good, just gotta get it close to air tight and the fans are very effective.