if it's possible, you can have all 3. cfls don't get very hot and they are low on energy so do all of em if you can. when the plant gets bigger it'll have trouble getting some of the light to the lower leaves. so for this u can put the 68 on top, and the other 2 on the sides. this could require some outlets though. also, not too expensive, gl man.
If you decide to go w/hps, keep in mind you will most likely have heat issues. Be prepared to add venting, exhaust fan, perhaps a ballast. I grow w/the larger spiral CFLs using clamp-on fixtures and diy fixtures. For flowering I use eight 105 actual watt/400 watt incondensent output, 2700k, 5000 lumen, and I use six 85watt/350watt, 6500k, 4200 lumens and six 26watt, 5000k, 1700 lumen as supplement lights for vegetation. I'll add a flowering light or two in w/my veg. lights and vise versa to mix the spectrums up abit. I have a 4ft x 4ft x 9ft grow closet. I have no heat issues, can place any of my CFLs along, above, below and front as well as behind each plant. You cannot do that w/hps. Review my 1st grow journal, you will see that CFLs are my choice of light. Good luck w/ur grow. Photos of 1st grow, CFLs can take you all the way.....
