I have a bunch of 23 watt cfl bulbs, but they are 5000k. I was thinking of getting some 13w 6500k bulbs and splitting them, since 6500k supposedly is the better light, and I can get them pretty cheap. Forget about the color for a sec, is there any difference between 1 23w and 2 13w split? I know it's probably a silly question, but I keep hearing how the intensity is important, so maybe the higher intensity of a 23w is better for the plants?