A CO2 system cost is mainly in the computer, then the valve. I've had no problems just getting a big tank refilled every so often, just say you use it for welding. Cops aren't looking for CO2 transactions, if you're really worried, just pay cash. Just buy things from different places.
Not sure on the wattage of the cfls, just use the most powerful ones you can afford, stick with the curved ones that fit in a normal socket.
zlessley Reviewed by zlessley on . New Scrog Grow... Questions? Ok so here's the setup thus far: Veg/Flower phases: 4'x4' space, about 6' ceilings. 430w HPS Son Agro system/bulb in cooltube w/ batwing reflector 250 cfm fan w/ ducting to outside for cooling light system several smaller fans circulate air around the plants for proper venting and to increase strength of stems Mother: flouro light (what's going to be optimal to keep her healthy and flourishing?) Rating: 5