Phillips Silvervision 4200k white headlight bulbs

[Alpine]

http://cgi.ebay.com.au/NEW-H4-Philips-Performance-Bulb-Set-SilverVision_W0QQitemZ220239587980QQihZ012QQcatego ryZ42613QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Has anyone tried these at all? Just wondering if they are any good. Seem pricey. It claims to be whiter than Phillips Crystalvision...

[dsp26]

check this:
http://www.ozhonda.com/forum/showthread.php?t=80068&highlight=lights

[Alpine]

Nice.

So anyway, has nobody used these at all???