Light extractor-diffuser

A light extractor-diffuser for illumination of a subject using artificial light which comprises a frame having two opposed spaced apart registered panels of substantially equal size;

• two triangular panels of substantially equal size, each of said triangular panels extending from intersection with a linear edge of one of said registered panels, with a base edge of each triangular panel being attached to said edge of one of said registered panels, said triangular panels diverging outwards from said frame at an angle so that the linear distance between the respective apexes of the triangular panels is greater than the distance between said registered panels, and a substantially bilateral trapezoidal panel, said trapezoidal panel extending angularly outwards from lateral attachment to two opposed edges of said triangular panels and having a wide terminal portion spaced away from the intersections of said trapezoidal panel with triangular panels, the narrower of the two parallel edges of said trapezoidal panel extending between opposed acute-angled base angles of said triangular panels.