OEM Xenon dosen´t light up

Xenon light on my Superb 3u has stopped functioning, both bulbs lights up briefly and goes out again. just before it stopped functioning one og the light bulb with a reddish color, while the other only shone briefly. The bulbs and switch modules as pages at the back of the bulb (ds2) is about 6 months old. Bulbs are Phillips x-tream vision purchased on Ebay and switch modules purchased from skoda.

 

If it that the ballasts that are defectiv, what I thought would be strange that they would get off simultaneously, or it may be some copy bulb I've bought on eBay and therefore is of poor quality or perhaps something completely different.

 

Anyone who has experienced this ??