The tent is 60" tall, 48" wide, 24" deep. The HPS puts out 16,000 lumens. I don't know what the CFL puts out (a conservative estimate is between 9,200 and 10,200, per my research). The 5000k CFL puts out 8000 lumens.
I also just got my hands on a 36w LED Grow Light (12 3w LEDs, 3 blue & 9 red - 460nm blue light, 660nm red light) with an aluminum light reflector. I know nothing about LEDs or LED growing, but for free?? Hey, why not, I'll figure it out! I've got a nice spot I can clamp it on a pole, but I need to do some reading on distance placing first.
Anyway, sounds like the 5000k might be a good one to supplement with.