I think most of audi tt mk1 halogen headlight shall be before 2015.

After 2015, audi tt mk1 headlight bulbs are using D xenon hid bulbs.

All of our audi tt mk1 halogen headlight and hid can be replaced by led now.

In order to make you clearly our audi tt mk1 halogen headlight, I will show you pictures as below.

Most of audi tt mk1 halogen headlight using h7.

Our audi tt mk1 halogen headlight adopting “Anti-uv quartz glass” and “Long life filament”.

So the life time of our audi tt mk1 halogen headlight is at least 3-5 times as long as other suppliers.