DIP (Duel In-Line Package)
DIP LEDs are the more traditional diode/indicator-light-looking LEDs containing two connecting pins that are through-hole mounted to PCBs (printed circuit boards). DIP LEDs were more widely manufactured prior to the 21st century have higher optical decay, lower CRI, and lower efficacy than the more recent SMD LEDs. However, many DIPs are still used today in many applications.