Mine has been kind of going from bright to dim and back and forth for a while now. Had a new battery, alternator, and pigtail installed in January. No idea what is causing this. It seems to not do it at 3000+ RPMs, or after a while of driving.
2003 Infra-Red ZX5 SVT - Cheap Spectre intake (don't judge, was on there when I got it), Hawk HPS pads front/rear, Russell SS lines, Goodyear Eagle GT 215/45/17
"If guns cause violence, then all of mine are defective" - Ted Nugent