Abstract: A connector for coupling an end of a light-transmitting conduit comprises a pivotable socket for mounting adjacent an opening through which light from a light source passes and having a passage therethrough formed to allow an end of a light-transmitting conduit to be coupled to the socket. The connector also comprises a shutter piece extending from the socket so as substantially to block light passing through the opening from entering the passage when the socket is in a first position, and substantially to expose the opening to allow light passing through the opening to enter the passage and pass into the conduit when the socket is in a second position.