I had no idea the visual difference that moving along the Kelvin spectrum could make in how the tank looks. I recently added live plants to my tank, and as part of that research I decided to move from an 8,000K 15W bulb to a 6,700K 15W. The 6,700K should, in theory, help a little better with photosynthesis. (I know there's a lot more to it than that, what with PAR, LUX, etc.)
The bulb that came with my tank kit was 15W, 8,000K. I'm not sure what other "stats" this bulb would have, but here is a shot from two days ago with that bulb (no flash):
The new bulb is a "Premium Tri-Phosphor", 6,500K, full spectrum. Here is the same angle shot with the new bulb shot this morning (no flash):
I did not realize how "blue" that old bulb was, and how it washed out the look of the plants. I like the new color temperature a lot better.
The bulb that came with my tank kit was 15W, 8,000K. I'm not sure what other "stats" this bulb would have, but here is a shot from two days ago with that bulb (no flash):

The new bulb is a "Premium Tri-Phosphor", 6,500K, full spectrum. Here is the same angle shot with the new bulb shot this morning (no flash):

I did not realize how "blue" that old bulb was, and how it washed out the look of the plants. I like the new color temperature a lot better.