I currently have a CustomSeaLife 32watt retrofit (10000K, PC) for my Eclipse 12 FW planted tank with yeast CO2. I am going to have to replace the bulb shortly and have been considering getting the 6700K 28watt bulb instead and have two questions: will my Electro-Lite ballast still work for 28 watts and does it really make a difference to my plants to have 10000K versus 6700K?