I am retro fitting 3 lamp fixtures and have electronic ballasts that say 4 or 3 lamp applications. The schematic shows only 4 wire set up. I wired them using 1 yellow to one end of all 3 lamps and then separately wired the other end with blue and red leads from the ballast. I believe that is what is needed and they work, but Advance is not very clear on using them for 3 lamps (i.e. no schematic). Anyone see any issues with this?