One switch for 3x flood lights

[ey143]

What will be the behaviour of a LED security flood light if one switch is used to switch on the circuit of 3x security lights with their own sensor?

Will they each act independently and only come on individually when their own respected sensor is activated or do they all come on at once?
Also do most of these flood lights allow you to have them permanently on eg during parties etc and bypass the sensor?

 

[AndyPRK]

Usually independently.

some have an overide function if the switch is turned off for 1 second (or whatever) and then back on
Read instructions

 

[SimonH2]

"It depends"
As Andy says, some (but not all) sensors have some sort of "switch off/on in some pattern and it goes into override" - our porch light is switch off/on 3 times quickly. With many it's as simple as switch off/on once, quickly - so if there's a short supply interruption (as can happen during thunderstorms, or where overhead lines go through tree) then you find your security lights "stuck" on.
If the switch is just in the supply, and you don't inter-link them, then the three lights will work independently - with the ability to switch them all off at the switch.
Many, but not all, sensor light have the ability to interlink them - the switched line is made available on another terminal. If you connect the lights together with 3 core (plus earth) cable then you can have them so that when any sensor is triggered, all the lights come on together - and they'll stay on until all triggered sensors have timed out.