There has been much discussion among various members of the design team regarding light pollution. Our understanding is that LEED states: no light traveling horizontally can pass the site property line, and that any light traveling in a vertical direction must be eliminated or blocked (you could uplight a covered bridge) so that no light escapes upwards into the sky. The Architect on this project wishes to uplight a translucent awning at the entrance of the building. All other exterior lighting will be downward. This architectural feature would be visible from above, however the translucent glass will diffuse the light, making the feature no brighter than downlight reflected off, say, concrete. Does the translucent awning make a sufficient light barrier by diffusing the uplight to eliminate light pollution?
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