the 85 puts out 450W daylight, the 65W 300=320W of flowering 2700. I use them on top of plants that are stretching, or finishing. The last 2-3 weeks 400W HPS, 250MH vertical and spot cfl placement. CFLs run cold. . . Thank you for watching and I appreciate any comments or Q's. I have much more space, 4x4x6.5 tent, to adjust plants out as they grow. Come along for a grow. . .