Interflection tables for rooms with floors of high reflectance

✍ Scribed by James S.Y. Lee

• Book ID: 103077468
• Publisher: Elsevier Science
• Year: 1950
• Tongue: English
• Weight: 435 KB
• Volume: 250
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(50)90581-3

✦ Synopsis

Previous interflection tables 2 have given the necessary data for the design of lighting installations. These tables include the effects of multiple reflections among walls, ceiling, and floor, these interflections having been taken into account by the solution of an integral equation.

Values were given for the interflectance f and the ratios Hlr/Dav, H1M/DAv, H2/Dav, and H3/Dav for floor reflectances of 0.10 and 0.30.

Recent investigations show that floor reflectances even higher than 0.30 are advantageous. Thus there seems to be a growing need for interflection tables for higher floor reflectances. In such cases the usual procedure has been to extrapolate from the available tables, but this process is questionable since the previous values for floor reflectance (0.10 and 0.30) do not provide an adequate basis for extrapolation. The purpose of this paper, therefore, is to compute new tables for floor reflectance of 0.50, which will allow interpolation for all ordinary rooms. The effect of high floor reflectance on the light distribution in rooms may also be ascertained.