Yeah they seem to not respond much to the dimmer switch. They do go off when you turn the dimmer all the way to the left, but then your speedometer etc lights are off too!
That's good feedback. So, the LEDs don't modulate with the rheostat/dimmer? I know a few people "dimmed" the LED backlighting of the clock display with some type of opaque film. Seemed it really took the harshness out of it.