I'm looking at getting this https://www.amazon.com/dp/B0027J2UR8/ref=cm_sw_r_awd_jP62vbGBE5QA4 for my bta and recently found hitchhiking mushroom. I read I should have 4 watts per gallon, which would be 260, but can't find a 36" 6x39 lamp setup. This one only does 156. It's a 36x24 deep tank I believe. Is this gonna be an issue or will it be enough light?