Shadow-Caster NMEA2000 Shadow-NET Lighting Controller w/2 RGB Channels [SCM-N2K-RGB]NMEA2000 & Shadow NET Lighting Controller with 2 RGB Channels The Shadow Caster NMEA2000 only RGB Lighting Controller (SCM N2K RGB) is a compact and efficient way to control RGB lighting across an entire boat. The NMEA2000 RGB Controller also has a built in Shadow NET interface that allows the controller to synchronize color and brightness control with other Shadow NET devices, for example, to make Shadow Caster underwater lights match the color of