Okay, in parking sensor mode only, the ALP emits a pulse of about 60-80 flashes per second. Putting a red tail light in front of it does little (if anything) to interfere with the light visible to NVGs - though the range on them is visible to a little over 900nm.

I was unable to see anything that I would guess is protection mode from the sensor on startup/self test. The parking sensor mode seems to be a fairly mild (low intensity) pulse.

Guess I'll have to wait until tomorrow night to see the response to a LIDAR source.