The dipped beam is H7 and the high beam is H1. I bought some Xenon White bulbs off eBay and they make it look a bit better than the standard halogen bulbs. According to the manual you can't access the LED DRL, this has to be done by Vauxhall. Regarding HIDs it all depends wether they are CANBUS or not but I'm sure you can buy them as long as they are the right fitment.
It's a shame there wasn't an option for Bi-Xenon lights when buying the Adams
