In article ,
Banty wrote:

A neighborhood house has a small, bright (LED??) green light emanating from a
side deck of it nightly. What is this? Motion sensor? Camera?

Banty

Many GFI outlets have a green LED to indicate the outlet is live and has
not tripped. When I have the cover on my outdoor outlet flipped up the
LED, viewed on-axis, is quite bright even in daytime. Maybe the neighbor
has an outlet that should be covered.
Motion sensors usually have a red lamp that comes on when, well, motion
is sensed.
--
Chuck in Detroit