2000ppm,
I run a 2x2 DR60 and would reccomend a 150w hps all in one unit. They are cheap, less heat than a 250w, and if ya max out the gpw you should be able to pull 4-5 oz. Alot of people dont realize that the 2x2 footprint is actually reduced to 18-20" x 18-20" when it is all zipped up and the sides suck in a bit from the negative pressure. I have ran hgl leds, a 250w hps, and the 150w in the same tent at different times and I would say that the 150w is the perfect fit.
DD
I run a 2x2 DR60 and would reccomend a 150w hps all in one unit. They are cheap, less heat than a 250w, and if ya max out the gpw you should be able to pull 4-5 oz. Alot of people dont realize that the 2x2 footprint is actually reduced to 18-20" x 18-20" when it is all zipped up and the sides suck in a bit from the negative pressure. I have ran hgl leds, a 250w hps, and the 150w in the same tent at different times and I would say that the 150w is the perfect fit.
DD