WHILE DRIVING ON A HIGHWAY, THE CAR CAUGHT FIRE UNDER THE HOOD NEAR THE DRIVER'S SIDE HEADLIGHT. THE HEADLIGHT WAS REPLACED THE DAY BEFORE THE INCIDENT. THE HEADLIGHT WORKED WHEN INSTALLED BUT WAS NOT WORKING BY THE NEXT EVENING. THE DRIVER'S SIDE HEADLIGHTS HAVE NEEDED REPLACING MORE OFTEN THAN THE PASSENGER HEADLIGHT (A 3:1 RATIO OR A 4:1 RATIO). THAT RATIO MAY INDICATE AN ELECTRICAL PROBLEM. HEADLIGHT BULB WAS A NAPA BP1255/H11LL-N. OUR CAR TOOK AN H11 BULB. THE LL STANDS FOR LONG LIFE.