Is that the flowering room or half veg and half flower? If half and half put a 600watt in the flowering room maybe, either way it will be nice bro. Maybe a carbon filter in the mix to eh. Also are those air cooled hoods?
I have a few things to say about putting those furnaces in a 2' wide closet. Check out the T-5 lights. The are simply a better choice for this application. I have a little more information about them and the results, its not in a closet, in a couple of threads. There in my signature if you want to take a look. VV
^^^ yeah I had my 600watt in a closet just like that. It was 2 feet wide and I had a 2x4 tray.. Man you have to air cool that light or your plants will toast.. My floro bank still made the room about 100 degrees with the door closed. Duct out a window and you will be a happy camper..
Run your setup for a day with no plants in there and keep track of temp and humidity.. When I had no cooling I was watering like 3 times a day going 'what the heck'