The panel of enlightenment picture transmitter and lamp using the same

摘要

A light transmitting enclosure for a ceiling mounted lighting fixture provides novel lighting patterns heretofore obtainable, if at all, only with reflectors and baffles. In the preferred embodiments, the light distribution pattern is a batwing pattern which reduces both direct and reflected glare. In a preferred embodiment, a lenticular pattern on the lower face of a horizontal reach of the enclosure enlarges a pattern of upwardly convergent protrusions having light reducing upper surfaces which form a light reducing pattern on the upper surface of the reach directly above the lenticules, to reduce luminance at viewing angles near the nadir; the lenticular pattern also cuts off high angle luminance to complete the batwing pattern. In other embodiments the light reducing pattern is provided directly on a flat upper face of the reach. In other embodiments the pattern is positioned relative to the lenticules to provide different lighting patterns. In still other embodiments the upwardly convergent protrusions provide the principal or sole means for reducing luminance at low viewing angles.