Why does both head lights go bad after a months? on 2005 Volkswagen Beetle

I did buy 2 hole head lights for my bug. but my lights still burn out after a month.

Asked by for the 2005 Volkswagen Beetle
I would have the Headlamp control module and Igniter tested. Also were you carefull not to touch the bulbs with your bare hands? The oils from your skin can cause the bulb to burn out.