I have a custom aquarium 24Lx20wx20h. The depth is the issue for me. I am currently using 3 65w CF 6700k bulbs. It seems though that I'm not getting enough light at the bottom. Does it matter 6700k vs 10k in terms of penetration or is it simply wattage. My other problem may be as simple as not having the proper dosing yet. Just wondered if k made a diff. or if its just wattage. I don't want to use MH due to the heat issue. Thanks for any insight. Ben