Can a vintage Zeiss Ikoblitz flashbulb unit be converted to electronic flash?

There generally isn’t a simple plug-in electronic replacement for a flashbulb in a unit like this. Flashbulbs contain their own energy and only need a small trigger current, while electronic flash tubes require much higher voltage and supporting circuitry. So converting this vintage reflector to reusable electronic flash would mean building modern flash electronics into the housing, not just swapping bulbs.

If you want to keep it original, replacement flashbulbs may still be available as vintage stock. For this Zeiss unit, search for RF1B Blitzlampen. According to the manual referenced in the community answers, AG1 bulbs may also be usable; if using AG1, fit the clear protective cover because bulbs can burst.

More broadly, vintage flashbulbs came in several formats, including bayonet, M-type push-in, and AG (all-glass), so confirm which socket your specific Ikoblitz uses before buying.

If your goal is simply to use flash on camera, a separate modern electronic flash is the more practical option than modifying the bulb socket.