How do I determine the voltage and necessary power supply for this bulb?
This bulb is a UVC low-pressure mercury vapor bulb used in my air purifier. It fits in a G23 Socket; normally I would expect a compact fluorescent bulb (G23) to have a ballast built in. This bulb is incandescent but it fits into a fluorescent socket. How do I drive this bulb, I'm assuming I need some sort of ballast?
Note: I believe this bulb is the old-style bulb which, according to some references, is considered incandescent but admit I do not know for sure. It does contain a filament.
An older design looks like an incandescent lamp but with the envelope containing a few droplets of mercury. In this design, the incandescent filament heats the mercury, producing a vapor which eventually allows an arc to be struck, short circuiting the incandescent filament.
- from Wikipedia