The high output Philips bulbs that I fitted about 4 years ago finally died this winter, so I found these on special at Repco. The low beam is noticeably whiter and brighter now - a worthwhile upgrade for about $50. You also get a couple of "blue" sidelight bulbs.
I noticed when fitting the bulbs that they are actually made by Osram in Germany. You're never quite sure what you'll find in a Narva box, so I think this was a definite win.
EDIT: Oops, I uploaded a photo of the H4 bulbs.
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