Recent Developments in Fluorescent Lamps, with particular reference to Colour Problems

Joint Meeting of the Midlands Section with the British Association of Chemists held at the School of Arts and Crafts, Derby, on 21st March 1951, Mr. A. J. Wesson in the chair A brief survey of the factors influencing fluorescent lamp utility is followed by an account of the phosphors used, with particular reference to their emission bands and the specification of the resulting colour properties of lamps by spectrophotometry and colorimetry. The problem of adequate colour rendering is discussed with examples, in particular the attempts made to improve rendering at the red end of the spectrum.