It couldn't very well not work; all it is is a 40 watt tungsten bulb inside a 'flying saucer' pressed steel case painted in a peculiar limeflower colour. It's an old family possession. (I put a new cable on it btw...)
The red light (actually the heating bulb showing through a tiny window) illuminates when it's plugged in
The inner workings; note the warning about the wattage. You want your bed to be nice and toasty, not toast.
It's beautiful. Today I have USB powered rechargeable hand warmers for pre heating the bed. They use seven to twelve watts. Oddly hot. The charging bank holds about eight full recharges and has its own USB so it can be charged.
