Warning zone lights
Warning zone lights are a sub-genre of warning lights. The special feature of these lights is that they do not emit a generally visible light signal into the environment as, for example, rotating mirror beacons or strobes do, but rather project a light signal onto the ground in front of, behind or next to the vehicle. As spotlights, passers-by are thus alerted to a movement of the vehicle or a load hanging from a crane; warning line lights or area lights, on the other hand, mark the border or the entire danger zone around the vehicle.