(S) Replacement HeadLights

hi

I thinking about chaning the bulbs for my headlights and fog lights. I want to get some ICE blue style lights which I have seen in my local car auto store in birmingham. anyone had any experience? what do I need to get. I know that the car uses H4 size for headlights. but all the bulbs I saw had H4 $$$ ($ indicating something maybe?)
any help would be much appriciated

syphon

Seicento Sporting 2000 X
Black
Black Front and Side Indicaters
JBL ICE + Pioneer DCEH8400 HeadUnit ((10"Sub,4Channel 600w amp in boot),6x9 in parcel shelf,16.5cm in rear arm rests, 10cm in front)
Abarth badges all round from abarthbadges.co.uk

From my own experience, I'd say avoid Halfords Ice Blue headlight bulbs, cost a knee weakening £33 for a pair for the wife's Mazzzzzda and although bright, aren't exactly blue. The Ring Ice blue sidelight bulbs are garbage too, they don't do anything like what they say on the packet. While I'm having a whinge, Ring Silver Enigma indicator bulbs that flash orange but allegedly look silver when off, look virtually the same as standard orange bulbs in a Cinq. Another waste of cash.....Grrr!!

Pete.
Cinq sporting 1242cc
http://mysite.freeserve.com/close_to_cracking_up/