Brian Lawson wrote:

And the same is possible if the "lamp" burns out at just the wrong
time, as it is prone to do with the voltage fluctuations during
run-up. Bright-light is not as sensitive, but somewhat safer.

Brian Lawson,
Bothwell, Ontario.
I think anyone who would mistake the "burn out" of a lamp for the
way the lamp responds to the phase matching of the generators
should not be in the position of being alowed to do it. :-)
...lew...