STAY ON THE SAFE SIDE WITH HELLA BEACONS STAY ON THE SAFE SIDE WITH HELLA BEACONS. Beacons are not only required during rescue operations, but also always where a special warning is required to alert users to hazardous situations. This is frequently the case when working with heavy machinery offroad. If professionals have to rely on technology, their first choice will be HELLA beacons and warning systems.