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Lighting Glossary
Term:
Reflectance Ratio
The ratio of the total amount of radiation of light, reflected by a surface to the total amount of radiation incident on the surface. Lighter surfaces have a higher reflectance ratio whereas it is lower with darker surfaces. White walls reflect up to 85% of the light, light timber panelling up to 35%, however red bricks only up to 15%. Conclusion: the darker the space, the more light is necessary to achieve the same luminous intensity.
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