TallTom wrote:I would suggest you look at your grounds. Maybe even invest in a grounding kit.
I agree with Tom. My lights did the same thing a while back, I built a grounding kit and it seemed to fix SOME of the problem. I also replaced the door lights and rear plate lights with LEDs to further remove strain on the system.
The grounding kit costs much less to build and is very easy. Mine cost me a total of FREE, I had the material laying around. But, what I used would cost maybe $15 if that. All I used was some heavy gauge grounding wire from left over sound system installs and some end connectors...easy. I couldn't justify spending the extra $$$ to have a brand name on the kit. Wire is wire. (PheonixGold is what I had).
...And if it's still too dark, add more bulbs, LED that is...