Electrical Help Please.

[needawin]

I have an existing external security light. Non pir.
I am going to connect a pir sensor to the circuit.
The mains supply to the light and the sensor will have to go in different directions. What is the way to wire it?

Will I need a feed to the sensor and then a second wire going back from it to the light or is there some way I can split?

[needawin]

How did we get on to doorbells?

[donny48]

Doorbells, Khandros post at 8.57

[Khandro]

needawin; sorry for the intrusion, but I did say 'if I may'.