Q: Is it possible to deactivate the IR LEDs when using an external headlight?
A: Yes, but a cable has to be pulled off the board. By disabling the IR LEDs in the web interface of the camera, the camera switches directly to the day mode, in which the camera can no longer see the light of your external IR headlight:
IN-5907 HD Deactivate the IR LEDs
This is not possible with the models IN-5905 HD and IN-7011 HD. And not necessary in case of the IN-9008 Full HD !