Abstract: Earpieces (1) for spectacles integrating a light source (6, 16) at its front end have at their free distal end a pre-constituted detachable module (4) containing at least a powering battery (B), a switch (11) and electrical connecting means to said light source (6, 16) and having a certain cross section and an end surface, through an opening (14) of which a control stem (13) of the switch projects. A pair of electrical supply wires (17, 18) of the light source run inside a slender front and proximal part of the earpiece, the cross section of which gradually increases as far as matching the enlarged cross section of the detachable distal end module (4). The front and proximal part of the earpiece may have a box-like structure composed of two channel cross section elements (2, 3) joined together for defining at least a conduit along which run the electrical supply wires (17, 18).