description:

12mm 5V WS2801 Square RGB LED Digital Pixel Light  

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. Compared to our other 20mm LED dots, these are diffused 8mm LEDs so they are not as bright but they color mix a little nicer.  

feature:

SD controller 

WS2801 IC, Programable by Software, Individually Control

Conformal Coating,PVC glue protection, IP67, Water-proof protection
Easy installation (punching 12mm hole on metal panel)
50pcs per set, single led play rgb pixel light string 12mm 

* New system, high refresh rate,true color output;
* LED pixel protruding design make a broader perspective;
* High brightness with 6000CD/sqm ensure the complete outdoor use;

* Durable cover with plastic fabric raw material imported from German

Note: There are no labels on the wires. You can look at the example code or hook it up as follows: 

clock - blue, data - green, red - DC5V, yellow - GND.

There is a black arrow on the underside of the LEDs which indicates the direction of the strand.

Specification:

Applications:   

1. Lights, back lights, cabinet lights, edge light, architectural lights for corridor, canopy, archway, lights for paty and contour marking; etc.

2.They can be a good choice for advertising,Led screen, night clubs, coffee / wine bars, shopping malls,
various shops, cinemas, beauty centers, office fronts, even lights for household kitchens or living rooms, etc. 

Here‘s a link on youtube used the arduino rgb square 12mm ws2801 led pixel light.

http://www.youtube.com/watch?v=yya_IB6S-Ko