Urban Road Lighting Design Standards (5)

A.0.2 For the calculation of road surface brightness, the luminosity data of the luminaire and the road surface brightness coefficient (q) or the simplified brightness coefficient (r) are required. The actual road surface q or r can only be obtained by measurement. Since China does not currently have its own road surface brightness coefficient, this standard recommends the simplified brightness coefficient table recommended by the International Commission on Illumination (CIE) and the International Standing Committee of the Road Congress (PIARC) (ie Tables A.0.2-1 and A). .0.2-2).

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