>I *think* (i.e., not proven and not measured) that a
>built-in zero crossover detector is what does the trick
>in the X-10 wall switch module.
>
>This allows the bulb to start at *zero* volts on any
>given sinusoid versus a possible mid-maxima point where
>the peak for a nominal 120 V RMS household US system
>is around 170 Volts peak ... *this* no doubt does the
>trick in prolonging bulb life

At 60 Hz the filament must heat up pretty fast to not
mind the fact that you reach full voltage in 4 milli-
seconds.  Anyone know how long it takes to heat up
the filament?  (To where it's "warm enough")?

Barry

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