I have now ordered for the second time of Visolight and am very happy with the light output and the quality of the lamp. The light shines equally bright and achieved by the design and the last corner in the room. Installation is simple. The terminals are fitted with mounting clamps. These are well labeled to prevent confusion. A grounding cable is necessary because of the lamp body of metal besteht.Die lamps cover is made of plastic and can be easily mounted using bayonet lock. Top quality for reasonable money.