LED signal light insert blue W.1 grey. LED signal light insert, blue lighting surface/flush, for signaling e.g. toilet rooms, stairwells or elevators, brightness continuously adjustable via potentiometer on the insert, with insulation displacement terminals, inserts only achieve protection class IP55 when mounted with a surface-mounted housing or frame for flush-mounted mounting from the W.1 product line. Surface-mounted installation. Material: plastic, thermoplastic, impact-resistant.