5mm LEDs are the most popular size; they are small, versatile, vibrant and easy to use. 
LED is short for light-emitting diode. LED's have become a common component of our electronic lives, yet the science behind them is still fascinating. This 
How Stuff Works article is a great read about how they work. 
This listing contains the 36 LED's needed for the Wasara Push Lamp project. The set contains:
- 4 Blue
 
- 6 Green
 
- 6 Red
 
- 16 White 
 
- 6 Yellow
If you would prefer to buy LED's individually, please click 
here.