LEDs is a binky. This is a very basic 5mm LED with a red lens. It 's must for power indication, opto-electronic sensors,  fun blinky displays, and pin status.It has a typical forward voltage of 2.0V and a rated forward current of 20mA.

Specifiction:

1.8-2.2VDC forward drop

Max current: 20mA

Suggested using current: 16-18mA 

Luminous Intensity: 150-200mcd