It's about the plant having enough light to process the extra CO² efficiently. CO² will not increase the THC content but it will increase the foliage and bud producing area and that will give you higher yield.

fluorescents may work a little but not for the cost. HID is the only way to properly use CO² either Mh or HPS will provide enough light. We can get out the slide rule and do math ( Intensity is I=L/D²) but all comes to the same thing in the end no matter what you call it lumens, par watts what ever term you want to use it's still the same thing. More light is better.

Really CO² needs HID lights the more the better. One thing about reflectors is not only do they reflect light....they also reflect heat that goes with the extra light too. I stopped using bat wings or any reflectors years ago. Kool tubes are the way to go with Mylar lined walls and roof.
Zandor Reviewed by Zandor on . Compact Fluorescent Light Discussion So here we go again pot fans. BlackJack Round 2. germinating 6 seeds directly in soil. For those that followed my last grow, enjoy. For those that are following it for the first time...Enjoy :) I'll keep ya updated as the weeks go by. Rating: 5