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Make a small linear display with a glowing pure-green color using this elegant LED bargraph. This pure-green color is much more vivid and closer to blue than 'yellow green' LEDs. Only 1" long, it is quite visible but not so large it wont plug into a breadboard! 10 LEDs are contained in the plastic body. This display is bright, beautiful and funky with nice diffused rectangular lenses for a striking look. There are 20 pins, 10 on each side, with 0.1" spacing so you can easily plug it into a breadboard with plenty of space for wiring left over.
There is a playground article about bargraph displays. You can also just treat each individual LED as a single LED.