FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used for LED lighting systems with controlled light flux. Disclosed is a method of predicting service life of a light-emitting diode light source during operation. Method comprises measuring the heating temperature of a light-emitting diode light source and the power consumed when the light flux varies, constructing a functional relationship between the heating temperature of the light-emitting diode light source and the power consumed, calculation for design period of operation of average value of consumed power and on its basis determination according to functional dependence of average heating temperature of light-emitting diode light source, calculating, in relative units, the fraction from the maximum service life of the LED light source at the heating temperature in the steady-state mode and at the average heating temperature during operation, predicting (determining) the service life of LED light sources by comparing the heating temperature in steady-state mode and the average heating temperature during operation.
EFFECT: high accuracy of predicting service life of a light-emitting diode light source with variable operating mode during operation.
1 cl, 1 dwg
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