I have a 2008 Prius that is still going strong, but I am noticing that as the car gets older (and I get older) the headlights don't illuminate the road and surroundings very well. I am not a car person at all but imagine there must be a way to brighten them up. I tried to google this and was immediately confused by the assumption of a knowledge base that I don't have (halogen, LED, capsules, Xenon). I'd appreciate suggestions on what to do/buy.