Looking to enhance the color of my fish on my 20 gallon long tank. I use the normal 10 gallon hood light. I recently just bought a (Zoo Med) Reef Sun 50/50 light for $15. It says this is a 50/50 combination of 6500k trichomatic daylight phospor and actinic 420 phosphor. Unfortunately I feel as though this didnt really do all that much. Should I take it back and buy a light with 10000k? or 18000k?