A luminaire of the embodiment includes: a light guide portion having a ring shape; a light-emitting portion having a light-emitting element and configured to irradiate the light guide portion with light; and an incident portion provided on an outer peripheral surface of the light guide portion at one end thereof and facing the light-emitting portion at the other end thereof. Upon receipt of the signaling connection request, a first determination is performed to determine whether to provide admission to common resources. Parallax information is calculated based upon the plurality of images acquired at the first point in time, and the planar image acquired at the second point in time is created. The second housing member includes projections into the terminal receiving areas to limit forward movement of the electrical terminals in the terminal receiving areas.