Quote Originally Posted by Sjapp
oh sweet, so is this straight? 40 watt cfl produces twice as many lumens as a 100 watt incandescent?
Approximately, more or less, on average, it's just a little less than double.

how many watts of cfl is ideal per square foot?
Ideally, you want more than 70 watts per square foot. More is always better, as long as you can control the heat.

i love you guys
Glad to help.
psteve Reviewed by psteve on . grow box is 160 degrees + in under a minute. please help Hey so i currently have a couple seedlings growing under some lights in my room. http://img253.imageshack.us/img253/5385/dsc00135rw2.jpg i have a grow box in some room in the garage. Its a transparent container that i painted white on the inside, and then hooked up 2 bathroom light racks each with 3 spots, and a hundred watt max per spot. http://img227.imageshack.us/img227/7735/dsc00130rv2.jpg http://img511.imageshack.us/img511/545/dsc00131nz1.jpg Rating: 5