LED fixtures (or movers) should never be plugged into a standard dimmer outlet, but pluged directly into "proper" power, often called "hard" power. Even at full output a dimmer channel is still chopping the waveform slightly, and if you accidently dim to the power to the fixture then bad things can happen to the fixture.
LED fixtures take a hard power feed, and a DMX512 feed, and you control the fixture using DMX512 control directly. There are no dimmers involved, which saves your dimmers for fixtures that are supposed to be dimmed.