Curtis Turbo Star Series Blue Flashing Beacon, 11 → 36 V dc, Base Mount, Xenon Bulb

Dual voltage single flash beacons for operation on all vehicles with a 12 or 24 Vdc system.
Consumes 5 times less power than a rotary beacon.
Agreement from the Ministry of Transport is required for Category B vehicles where it is important to assist progress through traffic (TPFSB:  ambulances, gas/electricity vehicles, etc.).
Simultaneous synchronisation of up to 4 lights.