Embodiments of the present invention are related to a lighting system comprising a control unit that manages a lighting device with an LED board within an optical chamber. The LED board includes a first string of LEDs and a second string of LEDs. The control unit and the LED board are configured to electrically couple to first and second wires. The first string of LEDs and the second string of LEDs are configured to emit light having different spectral power distributions within the visible spectrum. The first string of LEDs is oriented in an electrically opposite direction than the second string of LEDs. The control unit comprises a switch configured to direct current between the first wire and second wire. The wire to which current is directed is designated active. The designated active wire activates one of the first string of LEDs and second string of LEDs.