Well, right now I am only using my 400 Watt HPS 2 hours in the early a.m. and 2 hours late p.m., due to heat issues. My Hubby will be installing my inline fan this weekend, then I'll use it all the time. In between the HPS I'm using a vertically hanging 125 Watt CFL 2700K and a 55 Watt CFL...