This isn't necessarily true. The switch is just a switch, and it's likely just connected to two extension wires that lead back to the main unit. It's only brought out so that the user can press the button without getting right under the tree.I agree that the smarts are not in this wall unit. I did determine that the only time the smarts work is with the foot switch, so I conclude that the smarts are on the underside of the foot switch.
Most likely they're bicolor LEDs, which are basically two LEDs with opposite polarity in a single package. Either that or, if the colors themselves change, then they're probably RGB LEDs which allow the controller to adjust the current to each of the three color-control pins (one for red, one for green, and one for blue) to create any color.I also believe that each bulb has two LED's with opposite polarity because the foot switch reverses the polarity of the voltage to the tree. When it reads +29 V I get white lights and when it reads -29 V I get colored lights. When it blinks the voltage changes from +29 V to -29 V at about a 2 second period.
Merry Christmas and Happy Holidays!On to the next problem! Merry Christmas!!