Werma signaltechnik tube mount led evs beacon werma signaltechnik 82939768 the werma signaltechnik 82939768 is a tube mount led evs beacon that will ensure a maximum attention grabbing effect the enhanced visibility system or evs for short is the name werma has given to this latest development which promises to bring about a revolution in signal technology this yellow beacon is ideal for generating the highest awareness levels and when immediate action is required werma signaltechnik 8