The color temperature of the light generated by the illumination system of the combined RGB fluorescent lamp system was shown to disagree with the estimated value obtained from a simple model basedon lighting data for three single fluorescent lamps. The discrepancy was not caused by the change in the light spectrum of each lamp due to the input power control, but was caused by the change in the luminous flux from the lamps. The error in the luminous flux estimated for the given lamp power was attributable to the spatial distribution of the light emission from the lamp. The magnitude of this error was typically 2 to 3.
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