Abstract: A lighting unit for use in a luminaire, in particular a luminaire for road and/or street lighting, has an adaptable light distribution wherein the lighting unit comprises at least two light sources or groups of light sources, each of the light sources or groups of light sources having an individual light distribution characteristic, wherein the overall light distribution of the lighting unit is adapted by modifying the ratio of the light outputs of the at least two light sources or groups of light sources

Abstract: A lighting unit for use in a luminaire, in particular a luminaire for road and/or street lighting, has an adaptable light distribution wherein he lighting unit comprises at least two light sources or groups of light sources, each of the light sources or groups of light sources having an individual light distribution characteristic, wherein the overall light distribution of the lighting unit is adapted by modifying the ratio of the light outputs of the at least two light sources or groups of light sources

Abstract: The light fixture comprises a pod suitable for being embedded in the ground, and housing a light source, and a cover provided with at least one opening containing an optical unit facing the light source. The optical unit is sealed relative to the cover by a gasket which fits snugly around the perimeter of a base portion of the optical unit and which is compressed by means of a presser member applied against a bottom surface of the optical unit. The cover provides a housing designed for the gasket and defined by contact surfaces comprising a wall facing the perimeter of the optical unit and a top abutment for the gasket parallel to the mean plane of the cover.

Abstract: The operation of the starting circuit is only allowed for a predetermined time period in response to a control signal which is generated either following the application of the alternating voltage to the input terminals of the lamp circuit at the beginning of a working period of the lighting installation including said lamp, or a predetermined delay after interruption of said alternating voltage due to a short power interruption. The operation of the starting circuit is not allowed if the lamp extinguishes due to an increase of its voltage, thus avoiding attempts to re-start a defective lamp.