Hi everyone, well i just finished adding all my new lights 70 W 14k MH , 32W of actinic t-5 and 32w 10k t-5. I have all that about 8 inches from my tank (20g long). I have been a little worried to keep the lights on due to possible overheating while I'm at school. Should i be worried or am i over exaggerating. also, should i keep the sps higher or not since its only 12 inches tall.