Act One Communications - Indoor, outdoor, mobile, and traffic signal LED message boards and displays. Lingo Industrial Electronics - Distributors of traffic signal and street lighting products and related accessories. Pelco Products, Inc. - Manufacturer of traffic signaling hardware. Lights To Go - Traffic light controls and signal flashers for collectable and automobilia enthusiasts. Traffic Signals Controls, Inc. - Traffic control systems and related equipment and services. P. Berghaus GmbH - Manufacturers of traffic signal systems for roadworks, beacons, mobile warning trailers, warning lamps, protective equipment and guide elements. Precision Solar Controls, Inc. - Manufactures traffic monitors, signal lamps, and solar powered changeable message signs. Amtek Inc. - A manufacturer of solid-state fluorescent and ultraviolet (UV) lamp ballasts.