Jim wrote:
>
> Bala,
>
> I now think that the zero-crossover start of an incandescent (sp?)
> bulb does more to prolong bulb life than any other means.
>
> I haven't done the math of this technique versus, say, Roman's
> 47R (240 V RMS mains) method and the moderating effect this has
> on the large inrush (surge) current that is blamed for early filament
> death, but I am pleased with the life I have seen to-date on one
> bulb whose longevity I have witnessed while under the lone, sole
> control of a wall-switch X10 module.


Jim, I agree zero-crossing bulb starting is a step
in the right direction, but also take into account
that in the 240vac mains countries we have many times
the bulb failures in 120vac countries. Again the
cold start power with a 240v bulb is MUCH worse than
the same size 120v bulb. Maybe a "soft start" over
a few seconds would be the answer??

I really do have a cupboard full of light bulbs
and bulbs blow every few weeks. I have started using
high-eff fluoros, but again with 240v mains these
tend to die pretty quick, usually the power semis
in them.
-Roman

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