Abstract: A lighting source arrangement comprising a light conducting cable formed of an optical fibre consisting of a plurality of elementary fibres, a device for holding and fastening the optical fibre onto a supporting structure and means for steering the light beam issuing from the fibre, wherein said fastening device is a device for holding the optical fibre in a stationary position and the device for steering the light beam emitted by the fibre comprises at least one member for deviating the beam which is mounted rotatably about the axis of the optical fibre onto a stationary holder.