US Patent 7843640 Light shelves for daylighting

The embodiments disclosed herein relate to light shelves for daylighting, and more particularly to light shelves that include both a diffuser and a reflector. According to aspects illustrated herein, there is provided a light shelf that includes at least one anchor bracket suitable for attachment to a building structure; at least one support beam attached to the anchor bracket; and a plurality of light transmitting airfoil-shaped louvers each supported and positioned by the support beam at a preselected fixed profile angle, wherein each of the louvers includes a diffuser and a reflective surface.