on the marine systems, the lighting units have 3 seperate light systems. 2 daylight bulbs, 2 actinic bulbs, and 4 LED moonlights. Each has it's own seperate plug. The lights are operated with a Coralife Power Center Dual timer.
on the FW system, the factory light units were retrofitted with 4 coralife 1 watt LED moonlights they were run on a Coralife Power Center (single timer)