An LED light guide produces distinct customized emission patterns of light from the top and bottom surfaces. This enables lighting fixtures to emit light upward and downward using a single light guide with LEDs on one or two edges, while varying the distribution pattern from top to bottom.
The light guide offers options that will produce a batwing distribution in the upward direction, while maintaining a more direct distribution in the downward direction. This distribution would allow proper illumination of a table or desk below the light guide and allow the indirect lighting of the room from the upward distribution. Other options include more Lambertian distributions downward for more diffuse lighting as well as varying output angles for the upward distribution.
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