OK to have flashing lights? video

[flynrider]

Legality will vary by state. It's been a few years since I read through the AZ statutes, but believe we have a restriction about flashing lights only allowed as turn signals. Constantly flashing, rearward facing lights would be a no-no. We also have a restriction on anything but red, white and amber lights on the rear of the vehicle. Amber being allowed only for turn signals and white only allowed for reverse.