Dipped headlight fault after running for a little

[Sherlock1965]

Hi guys

 

Ive just had my from offside dipped headlight alarm come on and found that yes the light was off whilst the nearside was ok. I tghiought straight away a new bulb however after I restarted the car the light came on again for 30 seconds or more then the alarm came on again.

Does this sound like a bulb replacement or an electrical fault guys?

 

If it is a bulb any ideas how much Audi would charge?

Thanks

[Trevor]

Has the car got Xenon headlamps?

If so, the ballast sounds like it is igniting the bulb but when the voltage drops down, the bulb is failing to maintain operation.