I've replaced the Halogen bulb in my wife's Ford Escort headlights many times. The high beam part is usually good; only the low beam filament blows.
My idea is to use these "useless" bulbs as light sources for work lamps or as auxiliary illumination for photography. They can run on a 12 volt battery (so the lamp can be portable) and the light spectrum of halogen is a higher quality than incandescent or fluorescent bulbs.
The main issue will be to devise a lens to protect the bulb, which can shatter easily if it gets wet.
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