References
- Horton G.A., French R.R. and Arena J.B., “Photometry of Luminaires Using Highly-Loaded Fluorescent Lamps,” Illum. Eng., Vol. 56, No. 3, p. 179, March, 1961.
- IES Committee on Testing Procedures for Illumination characteristics, IES LM-6–1954, Illum. Eng., Vol. 50, No. 3, p. 147, March, 1955; No. 4, p. 201, April, 1955.
- Walsh J.W.T., Photometry, Third Edition, London: Constable and Co., 1958, pp. 126–130.