here's what i need... if it even is possible. i have an LED light that i need to make brighter/dimmer (kinda like a brake light when you step on the pedal). any way i can take the 2 12v leads so that they are dim when one is active and when the second 12v becomes active, they get brighter? with a voltage regulator or diodo or something? any parts that do this? any help greatly appreciated

-barto