🚀 go-pugleaf

I'm a little confused by the present discussion.

If you only turn ON at the zero-crossing, you will, I suspect, avoid
RFI problems. But, first off, does this not give you problems in
modulating the output? You could only have setting that are multiples
of the number of {half} cycles. [I suppose that is not TOO limiting,
though, is it?]

Secondly, won't such a dimmer make the lamp singing problem far worse?
The filament gets heated, and cools, over a much longer period than
with chopper-type dimmers.

I suppose the solution is to use line power of a frequency far above
the audio range. Back when I was taking a course on electronic power
control, I recall reading of scheme to provide large office buildings
with ~100khz to run the gas discharge lighting. The idea was to reduce
the losses in the ballasts. Not only does that increase the "light/kw$"
but it would also reduce the "waste heat/lumen" that has to be cooled
by the HVAC.  Wonder what ever came of that idea....
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