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MikeT

headlight bulb life

3 posts in this topic

I have an old Norma-Cibi? expected bulb life chart from 1980:

note: the H-7 bulb didn't exist then, but I'd expect the H-7 to be similar to the H-1

H-4:

    [*]150 hours at 11 V

    [*]175 h at 11.5 V

    [*]225 h at 12 V

    [*]200 h at 12.5 V

    [*]125 h at 13 V

    [*]100 h at 13.5 V

    [*]50 h at 14 V

      H-1 and H-2:

        [*]300 hours at 11 V

        [*]350 h at 11.5 V

        [*]400 h at 12 V

        [*]300 h at 12.5 V

        [*]200 h at 13 V

        [*]150 h at 13.5 V

        [*]100 h at 14 V

          My own experience with Norma bulbs (made in France) is that they almost never burned out, and greatly exceeded the above estimates. These bulbs were OEM in Cibi? and SEV-Marchal lights in the 1950s-1980s.

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