A 400 watt HPS is really a pretty good place to be for 8 square feet of canopy without CO2 enrichment. You have 50 watts per square foot, with HPS thats perfect, if you were running CO2 enrichment then you could go up to 60 watts per sqft.I have 400 hps and 8 sq,ft closet
Thx man for ur reply, can tell about size of exase fan?A 400 watt HPS is really a pretty good place to be for 8 square feet of canopy without CO2 enrichment. You have 50 watts per square foot, with HPS thats perfect, if you were running CO2 enrichment then you could go up to 60 watts per sqft.