A luminaire (100, 300) comprising: a housing; a light guide comprising: a planar body comprising: a first light receiving surface; a light transmission region in optical communication with the first light receiving surface; an aperture comprising an inner circumferential wall defining a light emission region; whereby substantially all light received at the first light receiving surface internally reflects through the transmission region before extraction at the emission region; and a plurality of point light sources in optical communication with the first light receiving surface of the light guide characterized by the inner circumferential wall comprising a plurality of vertically extending flutes; said planar body further comprising a second light receiving surface opposite the first light receiving surface; whereby the aperture is disposed between the first light receiving surface and the second light receiving surface; wherein the planar body comprises a pair of cutouts, each cutout adjacent a corresponding side of the aperture; and further comprising an array of apertures, whereby a cutout of an aperture and an adjacent cutout of an adjacent aperture join to form a combined cutout; wherein the cutouts are triangular and the combined cutout is diamond shaped; wherein a bottom surface of each aperture of the light guide is coupled to a cup, wherein the cup comprises a reflective inner wall. a housing; a light guide comprising: a planar body comprising: a first light receiving surface; a light transmission region in optical communication with the first light receiving surface; an aperture comprising an inner circumferential wall defining a light emission region; whereby substantially all light received at the first light receiving surface internally reflects through the transmission region before extraction at the emission region; and a plurality of point light sources in optical communication with the first light receiving surface of the light guide characterized by the inner circumferential wall comprising a plurality of vertically extending flutes; said planar body further comprising a second light receiving surface opposite the first light receiving surface; whereby the aperture is disposed between the first light receiving surface and the second light receiving surface; wherein the planar body comprises a pair of cutouts, each cutout adjacent a corresponding side of the aperture; and further comprising an array of apertures, whereby a cutout of an aperture and an adjacent cutout of an adjacent aperture join to form a combined cutout; wherein the cutouts are triangular and the combined cutout is diamond shaped; wherein a bottom surface of each aperture of the light guide is coupled to a cup, wherein the cup comprises a reflective inner wall. a first light receiving surface; a light transmission region in optical communication with the first light receiving surface; an aperture comprising an inner circumferential wall defining a light emission region; whereby substantially all light received at the first light receiving surface internally reflects through the transmission region before extraction at the emission region; and a plurality of point light sources in optical communication with the first light receiving surface of the light guide characterized by the inner circumferential wall comprising a plurality of vertically extending flutes; said planar body further comprising a second light receiving surface opposite the first light receiving surface; whereby the aperture is disposed between the first light receiving surface and the second light receiving surface; wherein the planar body comprises a pair of cutouts, each cutout adjacent a corresponding side of the aperture; and further comprising an array of apertures, whereby a cutout of an aperture and an adjacent cutout of an adjacent aperture join to form a combined cutout; wherein the cutouts are triangular and the combined cutout is diamond shaped; wherein a bottom surface of each aperture of the light guide is coupled to a cup, wherein the cup comprises a reflective inner wall.