I’m upgrading from a 20 gallon nuvo to RSR 250. I currently have 2 brand new prime 16hds, running at 20 watts peak. I plan to keep some easy SPS in the tank, and predominately LPS. Wondering if I can get away with one more prime. Also I noticed the fan kicks on quiet loud even at 20 watts. If I got to crank each one to increase par in the 250, I worry the fans will be super loud on all the time. I guess I could upgrade to two hydra 32s but bought these lights like a month ago.