I was hoping to get a recommendation on a replacement bulb for my Pentair Pool Bulb. I have the old Pentair Color Wheel Bulb (I think it was called SAM) in a 15000-gallon inground plaster pool. The light still works but the wheel gets stuck frequently and even if it didn't would like to switch to an LED bulb. Are there any LED bulbs that I would just be able to remove the old bulb, screw in the new one, and change the colors/shows by using the lights on/off switch? Any suggestions are greatly appreciated.