Just finishing hooking up a SPDT switch so I can control my footwell lighting from 2 different power sources and an off option.
Switch Installed:
LEDs powered from the Dome lights (normal light intensity) -(this way for car shows and stuff I can switch the dome light into the Constant on position and have the footwells on also):
LEDs powered from the Ambient Lights and using the ABL dimmer to lower the intensity to the minimum (this way I can drive with the footwell lights on and not have to have the dome light on - I can also change the intensity so it isn't too much of a distraction when driving in the dark)