Originally Posted by civileng68
My lights are EXACTLY 10,000K. However, with 65 watts, what "K" can I go up to?
Well, I believe that the K refers to the color of the light not the power of the light.
lower K lighting is more yellow orange or red.
A 10,000 K is a crisp white and the higher you go the deaper blue the light gets.
20,000 K is a deap blue and for coral and other reef animals I've heard that they feed off of blue spectrum lighting so it's important to have one 10 or 12 K and a .03 actinic blue bulb.
or if you have two 50/50 lamps they'll work too.