I have 2004 honda accord that the head lights are burning out every 6 months or less not touching bulbs when I installed them and others have installed also they all burn out does anyone know what the deal is?

i have 2004 honda accord that the head lights are burning out every 6 months or less not touching bulbs when i installed them and others have installed also they all burn out does anyone know what the deal is?
Check the vehicles charging system for excessive amperage/voltage or excessive diode ripple. If the alternator/voltage regulator is allowing too much A/C voltage to escape this could be the cause.