Also give this a quick read.
http://reviews.ebay.com/quot-Xenon-quot-and-quot-HID-quot-and-quot-Plasma-quot-bulbs-the-truth_W0QQugidZ10000000001832221" onclick="window.open(this.href);return false;
Probably better off just getting some Bosch 90% brighter bulbs, think they are under 40 quid for a pair, and they are more than enough brightness, in fact I think they are too bright and often blind other drivers but they are road legal so whatever I guess, no need for xenon fake HID's.
Just to inform you, HID conversions are not technically legal either on Pumas (or most other cars for that matter( as they weren't designed with HID in the first place.
I know they are quite strict on this in certain parts of the country (in London they don't really give a damn, there's hardly any motoring police round here anyway) but I know they stop people in other parts of the country and check over their lights and stuff and are a bit anal.
my 2c
Will