So, I am planning on ordering a new bulb for my tank. I currently have a 65w CF fixture over a 37 gallon tank. It give off a nice amount of light, and plants are growing. I have currently a 50/50 bulb that came with the fixture. I didn't realize until recently that is considered a marine bulb. So I am going to switch over to a better color temp, but was unsure if I should go with a pure 6700k bulb or with a 6700k/10000k dual bulb. They cost the same, and I heard that 6700k was the standard way to go, but didn't know about the 10000k. What does everyone think?