If you want it quick and cheap I would get 4-5 6500k bulbs (so, 4 to 5 multiplied by 23watts a piece..looking at close to 100 watts) then I would get a red spectrum 2700k 43watt-ish to throw in there..so I would say 150 watts max if you want to do it that way
how much for the cooltube... a 150 hps cost 69.99 a 70 watt hps cost 20 dollars and still way better than cfls..what kind of cfls you getting 13 watts 4 for ten dollars.
Walmart had them on sale 4(red) for 9.98 and 2 (blue) for 7.78 a month ago. I was going to use tubes from walmart but with the room we had the CFL lights were a better choice. we are redoing our flower room I'll post pics when it complete..