Alliance Outdoor Lighting UL100-BT 5" x 4.25" x 4.25" Brass Integrated Bluetooth Underwater Light. We take pride in manufacturing solid brass fixtures, intelligent transformers and LED lamps with the widest operating voltage range in the industry. This makes it easy for us to stand behind our hassle-free lifetime warranty. It will be hard to find another product line that matches the value you will receive when you purchase an ALLIANCE outdoor lighting system.