I have this A4 with ballasts and H7 bulbs apparently? Please take a look at my video, it explains everything. I have left dipped out, I was going to buy D2S bulbs but there not the same as the ones I have in here. Can I get an adapter to plug in D2S bulbs from these ballasts? Or? Do I have to stay with these H7 bulbs? Thanks

Do I need D2S bulbs or H7? IS there a difference? It's an aftermarket 35w ballast set up. The bulbs say "HID H7" on them. Is there an adapter to make the D2S work on here? I'm just no sure what to do, I need a new bulb, need to buy 2.

This video explains it all

There was a bad link But I fixed it.