LED lamp

An LED lamp for generating incoherent visible light, comprising an inorganic semiconductor structure comprising a lower semiconductor layer having a lower face thereof and an upper semiconductor layer having an upper face thereof, said lower and upper semiconductor layers forming a diode; and an active region between said lower and upper semiconductor layers generating light; said structure having outer side faces surrounding the structure; means harvesting vertical light from said active region; a metal part in electrical contact with said upper semiconductor layer; a plurality of spaced-apart conductors each having at least a portion thereof in electrical contact with said lower semiconductor layer, at least one of the spaced-apart conductors being between light generating portions of said structure as viewed normal to said upper face, a heat sink above said upper semiconductor layer for cooling said upper face; electrical connection for causing currents to be fed to said lower semiconductor layer via said spaced-apart conductors when the lamp is turned on; wherein said semiconductor structure is arranged to have several light-diverting surfaces each meeting said upper face at an obtuse angle measured through semiconductor, each of the light-diverting surfaces being distant from said outer side faces and each reflecting light rays that have been generated by said active region and internally reflected at said upper face, a plane normal to said upper face cutting a plurality of pairs of said light-diverting surfaces and cutting at least one of said spaced-apart conductors.