The Art of LED Lighting - Brightness Control

The ambient lighting environment around your project may always be changing. In addition, LEDs connected directly to a power supply will run at full brightness or a predefined brightness depending on resistor values. You may decide to use a lower resistor value for more brightness, then dim manually.

Depending on the type of LED, full brightness is about 100 times brighter than its prototypical counterpart so chances are, you will want to dim your lighting features. All features can be tied to one dimmer channel, or each feature can have its own dimmer channel which is recommended. 

Connect as many of our three channel dimmers to our 18 volt power supply as needed provided you do not exceed the total amperage required from the power supply.
Also see FAQ and The Light Emitting Diode, Voltage & Circuits

Note: Always place resistors in front of LED circuits.