In this version specifically designed for dimming, TLACS-RDE adjusts the lumens according to the luminaire’s location in the tunnel. The adjustment is made per a signal received from the photometer. TLACS-RDE can also switch ON/OFF the luminaires usually installed in the threshold of the tunnel. The NWC communicate to a multitude of RDEs using a dedicated twisted pair bus. The NWC logs the data history in a database & tunnel configuration.