I have just read that the "Gro-Lux" type of tubes are not the best flos to have because the overall light output is too low. There are these "Sunstick-Full Spectrum(2200 lumens)" lights out there also-which I have heard are really good, supposed to most closely resemble the sun's light-but there lumen output is lower than the cool whites(3300 lumens). Supposedly, the cool whites have alot in the blue spectrum. I only got space for 4-40 watt tubes. I was thinking of some combination of "Sunsticks" with the cool whites. I also have 2 small 20 watt tubes that I'm putting in the corners. What type of combination set-up should I use? Please be specific. I have a 6 sq/ft(1 1/2 x 4)grow room w/ mylar.