Mk6 oem LED number plate light's are what I have,plug and play when all you have to do is get the cold lamp check on startup turned off via vagcom and that's it,they are expensive though...
This where i got mine, like most people i think http://www.ebay.co.uk/itm/XTEC-C5W-ERROR-FREE-9-SMD-LED-WHITE-VW-GOLF-MK5-07-/370428552593?pt=LH_DefaultDomain_3&hash=item563f432591