On a serious note, I used an old servo from my RC car days and a USB servo controller from
Phidgets to swing a "lollypop" of a big
juice can lid soldered to a brass bar mounted to the servo. It took 20 minutes to whip up a Delphi program to have a green (open) and red (closed) button on the lighting computer to swing the
douser in and out. If anybody wants the program, send me a note.