I installed a SF2000Pro, can't leave the pro part out but I don't know the difference, in my 4x8. I have 8 4 week old plants in there with a couple feet unoccupied, anyway after watch the video I mentioned earlier and this thread I determined I didn't have enough lights for budding. I now have 2 SF1000 @100w each, a VIVOSUN 2000e @200w, and the new SF2000 @200w and am still concerned. I have 2 120w leds in a 4x4 with 3 plants in it waiting to go outside, but I intended to grow 3 autos in there. Maybe I'll put a 650w in there next year, but I like the versatility of multiple lights and height options.
What do you think, have I got enough light in the 4x8?