FIELD: electricity.
SUBSTANCE: power supply adapter (20) is designed for lighting unit (50) that has solid-state source (50a, 50b, 50c) of light. Power supply adapter (20) contains input (22) for connection with the main power supply source, power transmission module (40a, 40b, 40c, 140a) connected to input (22) and providing output signal fit to activate solid-state source (50a, 50b, 50c) of light and controller (30) that receives voltage signal from input (22) and is capable to send control signal to power transmission module (40a, 40b, 40c, 140a) in order to decrease power received from the input (22). Power supply adapter (20) receives current from the input (22) as a function of voltage at input (22) so that power supply adapter (20) is a variable resistor for supply mains.
EFFECT: improving efficiency of power transmission to solid-state source of light.
15 cl, 4 dwg
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