LPC Round LITEPIPES® For Surface Mount LEDs. The VCC LPC series of panel mount light pipes feature a flush design with a low profile Fresnel lens and a wide viewing angle. The 4 mm diameter light pipes allows transmission of light from a surface mount or through-hole LED to a front panel display. The light pipes are available in a wide variety of lengths and a grommet retainer is available for secure mounting in high-vibration environments; see RS ; 137-1418 137-1418. Low profile flush design Clear optical grade acrylic, UL 94-HB Wide 160° viewing angle 4.3 mm mounting hole