Color temp has little to do with the lighting of a tank, it mostly has to do with the color of the light, and the needs of specific plants/corals. Colormax is one of the bulbs I dislike most. They do not provide good color IMO, and distort the colors of the fish themselves. Colormax is not made in HO T5, nor in any high lighting option. Compact fluorescent should not be compared to HO T5 as the lux ratings are completely different. The thing to look at when it comes to bulbs, is the total lumens put out. This can be done in a number of ways. For compact fluorescent bulbs, the average lux rating is 79.4, where with HO T5 48" Life glo 2 bulbs it is 422. A CF bulb is 65W putting them in at 5161 lumens. A HO T5 Life glo 2 48" bulb is 54W, putting them in at 22788 lumens. Lumen is the amount of light physically output by a light source.