"John Rumm" wrote in message
...
nightjar nightjar@ wrote:

How about a push to operate time switch outside the door and a motion
sensor switch in the bathroom, wired in parallel? The girls could push
the switch before opening the door and, if they are still inside after
the timer runs out, the motion sensor should keep the light on.

The difficulty with motion sensors (the phrase takes on a whow new meaning
in a loo!), is what happens whey you stop moving... Bit disconcerting if
you are sat on the loo at the lights go off.

The PIR light switch I use in my bathroom can trigger an on period of up to
20 minutes from one detection. If you haven't moved in that time, you are
probably past needing any light.

Colin Bignell