Currently I have a Coralife 50/50 CPF on a 30 gallon tank, was told that the light sepectrum was not right for my plants. So I am looking to replace the bulb with a different one. What is better a 6700k or a 10000k. Also found one on Big Al' that said it was a Coralife Colormax, 50% colormax color enhancing full spectrum and 50% 6700k full specturm plant bulb, would that work.