Optopipe® 515-130x Panel-Mount Light Pipes Dialight Optopipe® 515-130x Panel-Mount Light Pipes are ideal for products that contain a PCB parallel to the front panel that is in need of indication. The UL94-V0 water clear polycarbonate light pipes are secured to the front panel with a press-fit that is easy to install. Dialight Optopipe light pipes are designed for both single- and multiple-colored LEDs with three lens styles for optimal viewing angles: Flat, Convex, and Domed. These light pipes feature low voltage and minimal power consumption.