The Dialight 591-3001-013F is a CBI® circuit board indicator from their Prism® family. It features a 3mm surface mount (SMD) LED housed in a black plastic casing with a round, dome-shaped lens. The LED comes in various bi-color and tri-color options. Its black housing provides a high contrast with the LED light, and the LED is positioned at a right angle, making it ideal for power distribution board (PDB) indicator applications.