Have exterior lighting to lit up the outside landscaping of my house which I run off a exterior transformer rated at 12VAC, 60hz, 2.5 amps, 300 watts. I am running about 240 watts of coach lights over 3 lines off the above mentioned transformer as of right now. My problem is that I just built (2) small fountains for the outside landscaping which run off of low voltage pumps rated at 12VAC, 0.300 Amps, 2.5 watts and my transformer is to powerful. Without ripping up my landscaping because this is the only enjoyment my wife has because of terminal illness. Does anyone know how to step down the amperage of one line to supply these pumps? I believe that it can be done, I just don't have the techinical background to do it. Any help in this matter would be greatly appreciated. Thank you Bill