mine dim as well with the a/c cycling.... more dimming with the a/c on and the rear defroster on as well.....
it's a normal thing for honda.....
oh, i hate the distance/intensity of the headlights of the accords too..... my mom's old cr-v didn't have this problem whatsoever..... probably cause of ground clearance.... even the 7th gen accord's lights don't seem "quite right".....