... 0-10V/RS232/RS485/TTL 4.CE,UL,FCC,CUL 150W HPS digital electronic ballast CE,UL,FCC,CULModelHPS-150W-DLighting Source ... and stable performance·Wide range of operation voltage, suitable for large voltage fluctuation circumstances·A little current to start, ... of original installation charge·Low voltage to start, suitable for low voltage circumstances·High efficiency >94%,remarkable effect of ...