Parking Lights dim when headlights are on!!!!!!
You could also run power and negative wires from, say, a remote battery terminal, run a switch, and control your DRL's whenever you want to. You'd have to switch them on when you start the car, but they would never ever dim, so long as you wire it properly.
It sounds like a lot of work, but it isn't. Don't let it discourge you. If you get some decent room to work with, you can get the job done in an hour. Good Luck and be sure to post up with your results/findings.
gl with your task let us know how it turns out






