i do i put them as close as possible every day i adjust them, i'll show you pics of my box set up at some point 4 of the 6 bulbs actually hang down and can be adjusted to whatever length required i also have more holders to fit to the sides lower down, i tried attaching to bent coat hangers to sides but there was to much weight on end and it got very messy so i took them out, i also have tinfoil all along the roof and sides, the funny thing is i done loads of research before i started about the distance and my friend just used 4(20w) stationary bulbs at the top of his, low and behold he got a shit load of top quality weed from it check the last posts on irish tokers for pics, cfl's are very under rated i will upgrade to led's or maby a plasma in the future as cfls have poor canopy penetration but will continue to use them, i also have a 400w hps gathering dust i just can't justify wasting that much elec and drawing more attention to my grow it's like a small sun in the room, nobody seems to use the irish tokers page anymore was thinkin of starting a new group, everything we type here is on the main page where as group pages are a bit more private, would you be interested?