Abstract: A light signaling device (30) including a removable lighting device (32,34) and a security device (36, 44, 50) integral with the lighting device (32, 34) and lockable to a vehicle, such as a two-wheeled vehicle. The security device also serves to immobilize the vehicle. The lighting device may include a front signaling light source and a rear signaling light source housed in respective housings (32, 34). The security device includes a mechanical link (36) such as a wiring or steel strip between the housings, and a connecting device (42-70) for joining and locking the housings together.