hi all , I'm thinking of changing my head lights to a brighter type of bulb, Any idea's please . I don't think I can use LED bulbs. also which bulbs can I use for interior lights. I have got a 1.6tdi greenline on a 15 plate. 

Assume you have halogens.

 

I can't post a link on this crappy mobile, but this thread - Mk3 Octavia Headlight Bulb Replacement By RIncewindwiz, -  discusses it. You should be able to find it in the Search function.

Yes its halogen lights. 

Id fit either osram or philips. Used them in my old mk2 vrs and always worked and lasted well.