A skylight assembly comprising: a skylight cover ; a prismatic element configured to refract at least a portion of light that passes through the skylight cover, wherein the prismatic element comprises a planar surface and a prismatic surface comprising at least one prism having a riser surface and a draft surface, wherein the prismatic surface is opposite the planar surface, and wherein the planar surface is positioned between the prismatic surface and the skylight cover, a riser angle of the riser surface being between about 35 degrees and about 43 degrees or between about 45 degrees and about 55 degrees with respect to a surface normal to the non-prismatic surface; and an element positioning assembly configured to: position the skylight assembly over an opening in a roof of a building; dispose the prismatic element relative to the plane of the roof such that an angle formed at an intersection of a second plane containing the prismatic element and the plane of the roof is greater than 0 degrees but less than or equal to about 40 degrees, and orient the prismatic element so that the riser surface faces the sun and directs daylight into the opening in the roof, wherein the skylight cover is angled relative to the plane of the roof, the skylight cover having a pole side and an equatorial side, the equatorial side being positioned closer to the equator and the pole side being opposite the equatorial side, wherein the pole side of the skylight cover is offset from the roof, and the equatorial side is positioned closer to the roof than the pole side. a skylight cover ; a prismatic element configured to refract at least a portion of light that passes through the skylight cover, wherein the prismatic element comprises a planar surface and a prismatic surface comprising at least one prism having a riser surface and a draft surface, wherein the prismatic surface is opposite the planar surface, and wherein the planar surface is positioned between the prismatic surface and the skylight cover, a riser angle of the riser surface being between about 35 degrees and about 43 degrees or between about 45 degrees and about 55 degrees with respect to a surface normal to the non-prismatic surface; and an element positioning assembly configured to: position the skylight assembly over an opening in a roof of a building; dispose the prismatic element relative to the plane of the roof such that an angle formed at an intersection of a second plane containing the prismatic element and the plane of the roof is greater than 0 degrees but less than or equal to about 40 degrees, and orient the prismatic element so that the riser surface faces the sun and directs daylight into the opening in the roof, wherein the skylight cover is angled relative to the plane of the roof, the skylight cover having a pole side and an equatorial side, the equatorial side being positioned closer to the equator and the pole side being opposite the equatorial side, wherein the pole side of the skylight cover is offset from the roof, and the equatorial side is positioned closer to the roof than the pole side. position the skylight assembly over an opening in a roof of a building; dispose the prismatic element relative to the plane of the roof such that an angle formed at an intersection of a second plane containing the prismatic element and the plane of the roof is greater than 0 degrees but less than or equal to about 40 degrees, and orient the prismatic element so that the riser surface faces the sun and directs daylight into the opening in the roof, wherein the skylight cover is angled relative to the plane of the roof, the skylight cover having a pole side and an equatorial side, the equatorial side being positioned closer to the equator and the pole side being opposite the equatorial side, wherein the pole side of the skylight cover is offset from the roof, and the equatorial side is positioned closer to the roof than the pole side. <EOS>