Originally Posted by Rossco

Do you leave the headlamps on when you switch the car off? (I.e they go off when the ignition is switched off?)

If so, every time you crank the engine it voltage spikes the globes and fuggs them quickly.

Starting any vehicle with the lamps on (except HID's) is bad news.

You can get long life phillips H7's for twice the price but try switching the lights off before cranking it up.