Werma signaltechnik permanent beacon steady light 209 series werma signaltechnik 20910000 the werma signaltechnik 20910000 is a red permanent beacon steady light that has been designed for tube mounting the beacon produces a permanent steady light making the operator and others aware of a specific condition or is instructed to carry out a certain course of actionthe beacon is supplied with a wide input voltage of 12 to 230v acdc it is compact in design economical reliable and id