... 0-10V/RS232/RS485/TTL 4.CE,UL,FCC,CUL 150W HPS digital electronic ballast CE,UL,FCC,CULModelHPS-150W-DLighting Source ... TTL/DimmerWarrantytwo years.Professional patented control software , simple circuit and stable performance·Wide range of operation voltage, suitable for ... ·A little current to start, expansion of lamps life and reduction of original installation charge·Low voltage to start, ...