My side markers never sat well with me. The amber bulbs were never very bright to begin with, but also quickly darkened even more.
On top of that, they were starting to discolor the side markers themselves.
So, I made these with some flexible LED tubing. They are very bright and I really like they way they follow the line of the bumper. They will also compliment my CCFL DRL's nicely since they will both be a straight line that follows the bumper line.
I tried a few different configurations, but liked the single line up top the best.
It looks really nice at night.