PsYcHoTiC_MaDmAn - Its really up to you, I haven't really heard many people say anything about a noticable difference in plant growth for any bulb in that range, generally speaking the higher the number in that range the whiter the bulb looks and IMO the more visually appealing. You could also go with whatever is cheapest in that range... its really up to you. There isn't a perfect Color Temp though just the range as as a guidline.
I hope that answers your question.
Last edited by redstrat; 08-28-2006 at 05:37 PM..