Originally Posted by
metweezer
http:///forum/post/2677964
The higher the k rating of the bulbs the bluer the appearance. I think!
The "K" stands for Kelvins, the temperature of the light in the spectrum.
You can always try going 2-10,000k & 4-420nm Actinic. Or you can play with it and do 2-10,000k, 1-6,500k 50/50 & 3-Actinics, which will be more blue but not as much as the 2 & 4.
Changing brands I don't think will really change the color on the tank much, the 10,000k's are still going to wash it out.
Another option is to add another single or double fluorescent fixture and run Actinics only on it. Maybe like a T-8 or similar, something lower watt but will give good color. This is what I have on my 29gallon:
1x 65watt 10,000k
1x 65watt 420nm Actinic
2x 18watt 420nm Actinic
Total of 166watts
...it has a nice 'bright' look yet still has a deep blue tint and really highlights the tank colors. Just an idea.
Here's some light spectrum/heat charts below to help you.