What are wide angle LED Christmas lights? The wide angle lens shape is the smallest of the LED lenses. It’s also called five millimeter because that’s the diameter of the cylinder. The shape is called conical because of the cone that’s molded into the interior of the polycarbonate lens. This shape maximizes the amount of light broadcast. It’s very popular with cities and in applications where thousands of lights are in use. It’s frequently used when wrapping trees, and it’s perfect for a modern Christmas tree. Take advantage of the fact that this lens shape is seen in our 120 volt light strings, battery, and craft lights, and 12 volt sets. All are available at Christmas Light Source.