Avensis T25 (Xenon) headlights too dark

Hello, I bought a T25 used (private) at the beginning of the year. The car got the TüV seal in front of my eyes at the DEKRA. He had to pass for inspection of an exhaust probe, which was repaired by the previous owner (with invoice in the Toyota car dealership) and the car is passed by the inspection of the TüV. Now it is the case that when I drive on the road in the dark there is incredibly little light. I was therefore there two months ago in the workshop there has Tell me that it’s the Xenon burners and they changed for 100€ or 200€. I drive little country road and so I noticed now that it didn’t work out. Other cars have a real light cone, with me there is hardly anything. Motorway driving still goes, but on country roads it is really brittle. What can I do there? I have read somewhere that another part of the T25 with Xenon is a problem. Can you please help me? It’s a pre- Facelift model.