NOVELTY - The skylight has a set of elongate strip solar cells (5a-5d) i.e. crystalline silicon solar cells, supported by a substrate. A lens array (1) comprises a set of lenses (3a-3d) oriented along a common axis, where each lens is configured to concentrate light on the elongate solar cells. The lens array is parallel to and spaced apart from the substrate such that a gap is defined between the lens array and the substrate, where the skylight is arranged to permit diffuse light incident to pass through the skylight and to cause direct light to be focused onto the solar cells.    USE - Building-integrated photovoltaic (PV) skylight for use on roof of a building for building-integrated photovoltaic applications. Can also be used for self-regulating windows applications, roof-mounted PV modules applications, windscreeen applications and sunroofs for an automobile.    ADVANTAGE - The skylight installed on roof a building at latitude tilts transmits diffuse daylight into interior of the building while converting direct sunlight into electricity at high efficiency. The skylight allows shift of solar cells with respect to a lenticular array, so that the solar cells can generate electricity while partially blocking direct solar radiation from entering the building and reducing glare to provide self-regulating solar heat control. The skylight and lens arrays are used in combination with strip solar cells and lateral displacement tracking to reduce cost per Watt related to potentially reduced amount of semiconductor material to be used. The skylight can permit diffuse daylight to pass through interior of the building so as to provide lighting inside the building when the strip solar cells absorb the direct sunlight and convert the sunlight to electricity.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for making a building-integrated photovoltaic skylight.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a linear focusing concentrating photovoltaic system including a cylindrical lens array made from patterned glass.    Lens array (1)    Lenses (3a-3d)    Strip solar cells (5a-5d)