RGB Pixels are digitally-controllable lights you can set to any color, or animate. Each RGB LED and controller chip is molded into a 'dot' of silicone. The dots are waterproof and rugged. There are four flanges molded in so that you can 'push' them into a 12mm drill hole in any material up to 1.5mm/0.06" thick. They're typically used to make outdoor signs.
Sold by the strand, each strand has 50 pixels in series!The pixels are connected by a 4-conductor cable. +5V, ground, data and clock. Data is shifted down from one pixel to the next so that you can easily cut the strand or attach more onto the end.