A method and apparatus for a horticultural light for use in a horticultural facility that uses current sharing across any one or more LED strings within the horticultural light. A processor may determine the current requirements of the one or more LED strings that are needed to produce a given intensity level. The processor may then apportion the current generation capability of a DC-DC converter across all active LED strings using time division multiple access whereby each LED string may conduct its apportioned current within its allocated time slot to the mutual exclusion of the remaining active LED strings in any given time period. The processor may employ analog (continuous) and/or digital (discontinuous) dimming techniques within each time slot to further modulate the amount of current conducted by any LED string within its allocated time slot.
