I have been told that the only way to dim a LED is with a DMX controller. They don't actually dim, but flash very quickly to look like they dim. I heard this a year or so
ago. I was looking at skulltronics at the time and the LED eyes I wanted to dim.
The main way of dimming LEDs is with Pulse Width Modulation (PWM). PWM dimmers are readily available but can be a bit pricey. Have a look here for a cheap one:
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