FIELD: electricity.
SUBSTANCE: invention relates to lighting devices and control of operation of lighting devices. The result is achieved by that the system for control of the level of luminous efficiency of the solid-state lighting load operated by the illumination regulator includes the detector of phase angles and the load converter. The detector of phase angles is designed with a possibility of measurement of phase angle of the illumination regulator on the basis of rectified voltage from the illumination regulator and determination of the power control signal on the basis of comparison of the measured phase angle with pre-set first threshold. The power supply converter is designed with a possibility of supply of output voltage into the solid-state lighting load, and the power supply converter operates in the mode without feedback on the basis of rectified voltage from the illumination regulator when the measured phase angle is greater than the first threshold, and operates in the mode with feedback on the basis of the rectified voltage from the illumination regulator and a certain power control signal from the circuit of determination when the measured phase angle is less than the first threshold.
EFFECT: reduction of luminous efficiency in solid-state lighting load at low settings of the respective illumination regulator.
20 cl, 9 dwg
