In article , S. Barker says...

Why don't you walk over and see? Or, heres a novel concept...... You could
ask.

s

They're several houses down - don't know them. It'd be weird "hey what's that
green light".

I think the GCFI indicator LED is probably the answer. The side of their house
pretty much points directly to my front door (curve in the street). One night I
noticed a bright green light, that's all.

Cheers,
Banty