METHOD FOR EVALUATION OF LUMINAIRE'S LUMINOUS QUANTITY MEASUREMENT STABILITY, DEVICE FOR EVALUATION OF LUMINOUS QUANTITY MEASUREMENT STABILITY, PROGRAM FOR EVALUATION OF LUMINOUS QUANTITY MEASUREMENT STABILITY, AND RECORDING MEDIUM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a method for evaluation of luminous quantity measurement stability, a device for evaluation of luminous quantity measurement stability, a program for evaluation of luminous quantity measurement stability and a recording medium therefor, by which light source characteristics of a luminaire with a heat radiating structure can be made clear, and the evaluation of the stability in measuring luminous quantities of such a luminaire can be performed with good accuracy.SOLUTION: A method for evaluation of luminaire's luminous quantity measurement stability comprises the steps of: calculating luminous flux value variation characteristic parameters including an initial luminous flux valueΦ, a quantity of the change in a luminous flux valueΔΦand a time constantτfrom luminous flux values of an LED luminaire based on [Formula 1]; calculating a stationary valueΦof luminous flux of the LED luminaire based on [Formula 4]; and calculating a degree e(t) of luminous flux value output stability which is a result of comparison between the stationary valueΦand the luminous flux value based on [Formula 2].