Many compact fluorescents use a 30-40Khz AC power
source, so
stroboscopic effects may not be a problem unless your lathe's chuck
But if the input to that inverter is not well smoothed (and the output
not well regulated) there could still be significant mains-fequenct
ripple on the output.
However, my second point (of the afterglow in the darkroom) rather
suggests these lamps have long enough persistance phosphors for there not
to be a significant strobe effect.
rotates at a VERY high speed. You can also make use
of standard bi-pin
fluorescent lamps with a fixture that uses an active (high-frequency)
ballast.
For your darkroom, you might want to look into the multiple-white-LED
mains-powered spotlights. Ebay is full of sellers eager to unload them.
Hmmm.. Fromt what I rememeber, white LEDs depend on a phosphor in the
package to get the white light (LED's being naturally a narrow-band
device). I would worry about the persistance of that phosphor, I think.
I also can't see the point in changing. The energy wasted by keeping
filament lamps in those positions is minimal IMHO (they're not on for
that long or that often).
-tony