I just remodeled my flower area. I've done alot of searching, but I'm wonwering if anyone has the same set up. How does 2 600 HPS work in a 7 x 9 area. and does a window unit ac provide any if at all any c02. anyone>
Two 600 watt lights will be less than half of what you need to cover a 7x9 area for flowering. That is less than 20 watts per square foot. You need AT LEAST 50 watts per square foot. For the area you stated, you would need 3150 watts of HPS for flowering.
He is however correct about a AC unit producing zero CO2.
