I don't think it would affect it. I know light can affect IR motion detectors, but I suspect they are using a different frequency (they are trying to detect movement, not IR signals after all).
It should be an easy thing to test before installation. Simply point a projector at it and see if it sends out false signals. It doesn't need to be mounted nicely to do this test.
It should be an easy thing to test before installation. Simply point a projector at it and see if it sends out false signals. It doesn't need to be mounted nicely to do this test.