Anyone ever seen any of the garage-door-opener makers that
provide terminals so that one could attach an external indicator
light that would then light up any time the garage door was
open?

The old folks here in Florida are very frequently forgetting to close
their overhead garage doors and some of them (like me) have been
wondering how hard it might be to build an add-on circuit or whatever
so that an indicator light that we would install in their house would
remain on.

(I called the local distributor of 'Overhead Door' openers in Sarasota,
but off the top of their heads, they did NOT know of any such way
to add-on such an extra to THEIR models of door openers. But,
there are many other makers of openers, such as Sears and Genie, etc, etc
and you might think that one of them might have come up with externalizing
their 'upper-limit-switch' circuit to send that information along in the
form of two extra screw-terminals or something to signal this condition.)

Anybody know of such?

TIA...

Dave