On Thu, 9 Aug 2018 00:06:39 +0100, Andy Burns wrote:

Yes I understand both lights on at the same time but if the PIRs
are
set for different duration times will it be the activated one that

decides how long they stay on for?

if one is activated it will be that PIR's duration, if both are
activated, it will be the one that remains activated longest.

Assuming simple parallel switch wiring. The OP is not clear if the
second PIR also turns both lights on or only the one associated with
it.

--
Cheers
Dave.