The Whirlwind Rack Lightning series is our newest rack rail lighting system that can illuminate your rig in 8 different color settings with an adjustable dimming control to get you out of the dark ages and into the light. Available as a rack rail version, or as an overhead single space unit. PLR-PS3S is a single space unit that allows you to add a second pair of PLR-PSRK LED rail kits to your Rack Lightning system. With a simple connection to the PLR-PS3, you now have independent color and dimming control for the rear of your rack or the adjacent side of a double wide rack.