This breadboard is the first time I had dealt with high / super flux leds… otherwise refered to piranha or ufo package leds.

These came from www.lsdiodes.com and have a viewing angle of 45 deg… it makes them super tremendously bright looking indicators, and probably would work great for tail lights and such.

The piranha led has the chip or die mounted on a large heatsink connected to the anode … the cathode is also a heavy duty looking assembly, but its only connection to the die is a hair thin gold wire. The piranha led is an illumination grade led; it is designed to have a very high light output and be installed in close proximity to other leds of its kind. The large heatsink carries heat away from the die, but you still need to do something with that heat. The PCB board should have as much copper on it as you can fit, and the traces feeding the anode should be as beefy as possible so they can conduct heat from the pins.