400 vs 600 yields

Hey guys I was just wondering what to expect out of a 400 watt set-up. Thats the route I was totally prepared to go but then I thought maybe a 600w would produce more for the same space given regardless of method (i.e. ScrOG, SOG, LST etc...).

I wouldn't increase the size any and wondered if heat would be a problem in a wardrobe sized space? Point me in the right direction.

P.S. I was also thinking of just buying an additional 400 if I decided to go bigger with the garden

I would start with a 400w, just because once you go to 600w, your gonna need a A.C. unit or some other good cooling method. you can always add another 400w like you said in the future. Put a thermometer in the space your gonna grow, just to see the temps before you get started. Then add your light with your fans, leave everything closed up, wait 20 mins and see your temps then.

Very cool man thanks I will do that. A 600 will increase yeild and bud density though right? And, I assume A/C units dont go cheap huh...

Just buy a quantum ballast u can adjust the 600w from 300w to 450w to 600w and they only draw the watts ur using so its good for electric bills too..veg under300w then go to 450 then 600 last month

Hey thats really cool. Is there information anywhere that lays out how much light is optimal for plants of a certain size, type, and growth stage?