References
- MoonP. The scientific basis of illuminating engineering, McGraw-Hill, 1936.
- BoastW. Illmination engineering, McGraw-Hill, 1953.
- MurdochJ. B. A simplified procedure for calculating the direct components of contrast rendition factor and equivalent sphere illumination, NBSIR 77–1303, November, 1977.
- MurdochJ. B. Inverse square law approximations in luminaire effectiveness evaluations, NBS report, March 1978.
References
- LevinR. E. “Photometric characteristics of light controlling apparatus”, Illuminating Engineering, Vol. 66, No. 4, April 1971, p. 205.