Jandy Daylight White Pro-Series Nicheless LED Light w/ HydroCool & 100′ Cord 12V 12W uses 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. *Based on internal testing.