Have had my 4ft freshwater tank setup now for about a month and the temp stays around 32 degress, This a little to high for my liking. I looked under the hood and noticed it had 2 Sylvania aquastar f36w, 10000k marine lights in it. (are these fluros know to be hot)Am i able to use these for a freshwater tank or are these what could be causing the high temp in my tank. (it is not the heater, took it out). Any help would be appreciated.