I have the current LEDS- just bought them a month or so ago- lighting my 260 gallon. I would advise for you to go with the 2 36" over the 48". I prefer a lighter tank, and while the light effects are great fun, there are STILL dark spots in my tank with the full coverage. As far as the lights go= they are beautiful, run cool, and stand up to a few beatings/accidental soakings....