Analysis for Spectral Power Distributions of Fluorescent Lamps with Higher Efficacy and Color Rendering Indices

An analysis has been carried out to explore the optimum spectral power distributions (SPD's) with respect to the 40-watt fluorescent lamps.Numerical calculations have been done by digital computer and the perturbation method using the linear programming was adopted as the computer programming.The aim of the analysis was to determine the optimum SPD which enables the total luminous flux of lamp maximum under the constraints of given chromaticity and color rendering indices (CRI's).It was assumed that the spectral distribution of light output was composed of monochromatic lights wavelengthbandwidth of which was 10nm.It was noticeable that four monochromatic components having 470, 530, 580 and 620 nm of wavelengths are primarily important in order to obtain higher efficacy and CRI and other two monochromatic components of 460 and 520 nm are secondarily important.