On Apr 12, 7:15*am, Derek Copeland wrote:
Also we have two
lights, so that a stop signal is unlikely to be compromised by a single
bulb failure.

When I'm winching, I'm grateful that we have three lights:
* two for the normal up slack and all out
* stop = all three lights on continuously
I find I process that extra visual cue noticably faster than the
difference
between stop and the other signals. One day that half second might be
important.

We also have a buzzer that sounds in sync with the lights. I find
that useful confirmation of what I can see.