Werma signaltechnik flashing beacon werma signaltechnik 20912055 the werma signaltechnik 20912055 is a red flashing beacon that is a visual indicator suitable for use in indoor and outdoor applications the beacon is fitted with a diffuser for greater visibility and spread of light this very bright and durable beacon has been designed for mounting on tubes werma signaltechnik 20912055 red 209 rm 24vdc flash lamp