Pentair 78448100 Amerlite Underwater Incandescent Pool Light with Stainless Steel Face Ring, 120 Volt, 50 Foot Cord, 400 Watt Stainless Steel Face Ring With Uni-Tension Clamp 8-3/8 In. Prismatic Tempered Glass Lens For Optimum Light Diffusion. UL Listed When Installed In Pentair Niches. 4-foot overlap for easy installation Heat-Sensing Cutoff For Low Water Protection Allows Bulb Changes Without Lowering Water Level