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symmetric lighting, <in a road tunnel>

lighting design technique where the light equally falls on objects in directions with and against the traffic

Note 1 to entry: Symmetric lighting is characterized by using luminaires that show a luminous intensity distribution that is symmetric in relation to the plane normal to the direction of the traffic.

Note 2 to entry: See also "pro-beam lighting", "counter-beam lighting".

Note 3 to entry: This entry was numbered 17-1293 in CIE S 017:2011.

Publication date: 2020-12
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