FIELD: electricity.
SUBSTANCE: system to control LED lamp power supply comprises a LED controller (58); multiple LED channels (60), in the working position connected with the LED controller (58). Each of many LED channels (60) comprises a channel switch (62) arranged in series with at least one shunted LED circuit (83). Besides, the shunted LED circuit (83) comprises a shunt switch (68), arranged in parallel with a LED source (80). The LED controller (58) reduces power loss in the channel switch (62) or the shunt switch (68), when the power loss (Ploss) in electronic circuits of the LED lamp exceeds the power loss limit (Plim) in electronic circuits of the LED lamp; and each of channel switches (62) receives a signal (63) of channel switch control from the LED controller (58), and each of shunt switches (68) receives a signal (69) of shunt switch control from the LED controller (58). Versions are also described to control power supply of a LED lamp.
EFFECT: increased efficiency of light generation.
21 cl, 4 dwg
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