Here in AZ, it seems to be standard for DPS (and other local agencies) to turn off the front of the overheads once they have a vehicle stopped. I don't get why. I've seen it at all hours of the day and night. Back in my time, in another state, we were trained to turn on anything that flashed, blinked and spun.....and leave them on for the duration of the stop. The only time we would kill the forward facing overheads is when giving field sobriety tests. Anyone know? Sam or others in AZ?