FIG. 8 shows an example embodiment of the LED lighting system 20 in the topology 1, 2, 2 (one power source 10×two drivers 36 (361 and 362)×two LED lighting sources 40 (401 and 402) commutation policy ending configuration LED lighting source 402 connected to power source 10 through driver 361).
FIG. 8 shows when the LED lighting source 401 becomes defective or inoperative. For example, when the LS 48 sends information to the MCC 38 that the LED lighting source 401 is not adequate, and the measurement of Vin permits the MCC 38 to determine whether there is adequate voltage level coming from the PS 10, while the measurement of Vout permits the MCC 38 to determine whether the adequate voltage transformation took place and the appropriate/correct voltage level, the MCC 38 commands the OS 37 to disconnect from its LLS 401, and to establish contact with the next available LED lighting source, LED lighting source 402. When only the LED lighting source 401 becomes nonfunctional, the DRV 361 connects to the LED lighting source 402.
In FIG. 8, the LED lighting source 401 becomes non-functional or defective; the next spare LED lighting source 402 replaces the initially selected LED lighting source 401. This ensures LED lighting system 20 is operational, creating a new PPW 3:
PS 10>IS 35>DRV 361>OS 37>LED lighting source 402
