| 摘要 |
A lighting device 1 for an AC power supply 2 comprises at least two lighting groups 4.1 - 4.8, wherein each lighting group has an input 6 and an output 7 and at least one LED 8 arranged between the input and the output, wherein the lighting groups are connected to one another in series and wherein each of the lighting groups comprises a bypass arrangement 9, said bypass arrangement comprising a switchable bypass path 10, which is arranged in parallel with all the LEDs in the lighting group. The bypass arrangement is designed to activate the bypass when an applied voltage is less than a cutoff voltage and to deactivate the bypass when the applied voltage is greater than the cutoff voltage.
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