Color Flicker of Fluorescent Lamps

• Published in: Journal of the Illuminating Engineering Institute of Japan Vol. 38; no. 3; pp. 143 - 149
• Main Authors: Nonaka, Mamoru, Shikakura, Toshiro
• Format: Journal Article
• Language: Japanese
• Published: The Illuminating Engineering Institute of Japan 25.03.1954
• ISSN: 0019-2341; 2185-1506
• DOI: 10.2150/jieij1917.38.143

The variation of color during a cycle of various fluorescent lamps operated on a 50 c/s supply have been obtained by the following spectrophotometry: There is a special sector with narrow slits driven by a synchronous motor in front of the entrance slit of a monochromator. The radiation from a fluorescent lamp passes through the entrance slit at an instant during a cycle of the flicker and enters the multiplier phototube. By adjusting the phase difference between sources of the fluorescent lamp and the synchronous motor with a phase-shifter, the spectral distribution of the fluorescent lamp is measured at any instant during a cycle. The results of these measurements are shown on the ICI chromaticity diagram (Fig. 1) In addition, the wave-forms of flicker in relative intensities of spectral radiations from fluorescent lamps at different wave-lengths have been measured by using a cathode ray oscillograph, and the relations between the magnitude of flicker and the wavelength have been illustrated.