> I replaced one of of the (series string) bulbs with a (carefully
> insulated) 1N4007 to knock the voltage down to 70% of line and get several
> years lifetime 24/7.
>


Which reminds me... Some projectors use 70V lamps. I assume they get the
70V by half wave rectifying the 120VAC line. But why not just use a 120V
lamp? I'm guessing that it MAY have something to do with being able to
have a shorter filament making the light more of a point source and easier
to focus. Is the guess correct?

Harold

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