Zodiac Pool Systems JLU4C24W100 24w 12v 100' Rgbw Nicheless Led Light. JLU4C24W100 Jandy Pro Series RGBW Watercolors HydroCool 24W 100' Cord LED Nicheless, Underwater Lights Communicates with all Jandy AquaLink RS Control Systems with Minimum Rev. T.2 and/or Standard Light Switches Cool by Design The Jandy Pro Series WaterColors Nicheless LED lights with HydroCool technology use an innovative, energy-efficient design that harnesses the cooling power of water to create a cooler running, longer lasting* light. Designed to fit in a standard 1-1/2" return fitting, these lights are smaller to accommodate complex pool designs, and operate at lower wattages, while providing the same brilliant illumination as previous models.