Proven tunnel safety light; conforms to the guideline of the Swiss Federal Highways Authority: ‘Signaling systems of safety devices in tunnels’ synchronised flashing of up to 10 beacons in series with no [...] parallel operated lights 3D-Coverage - Outstanding coverage area. Achieve maximum effectivness with signaling devices from Pfannenberg. Find out more . protection system protection system impact-proof housing [...] a lens in one of the following colours: clear, white, yellow, amber, red, green, blue. Further technical details can be found in the Download section on this page. To make the order process easy for you