Flashing beacons utilize glass tubes filled with xenon gas to produce a bright flash of light when energized. The technology is also used for strobe lights and flash photography.
A typical flash rate is once per second – but this can vary by device. Units with multiple flash capability offer a variety of flash sequences and rates.
Flashing beacons offer the highest degree of signaling effect and are widely used for evacuation alarms for fires, toxic gas leaks, and chemical spills; as well as for warning of moving machinery and structures such as lifting equipment, service vehicles, safety barriers, gates, and doors.