On Sat, 4 Jun 2016 07:47:27 -0400, Stormin Mormon
wrote:

On 6/3/2016 1:40 PM, Mark Lloyd wrote:

The LED itself regulates voltage. That's what a diode does.


http://www.merriam-webster.com/dictionary/diode

Simple Definition of diode

: an electronic device that allows an electric current to flow in
one direction only

Source: Merriam-Webster's Learner's Dictionary

That's only half the definition. It has both forward and reverse
voltage drops, and forward current draw is determined by the voltage
drop and the supply voltage.

As long as the supply voltage does not excede the forward voltage
drop by ant significant amount, the current will remain within limits.