Probably.
I compared the 98 MV6, to the 00 CDX, big difference, both on original bulbs afaik
Compared both to Pete's new 6000k bulbs, they seemed brightest of the lot!
read somewhere 3000h operating life, thats a quite a long time for car bulbs.
Juding by the state of my headlight switch, they had been on one hell of a lot
I have also read somewhere, short on-off cycles, ie flashing your lights, shortens there life considerably.
If you are thinking they arn't what they were, £45 (or less) will get you a new pair.
Ones I am waiting on should be a whiter light as well, which will probably make them look brighter.
From what I can gather :
4300's are yellower, but illuminate (slightly) more
6000's are whiter, more natural, and the best compromise
8000's are bluer, more showy looking, but less effective, and getting worse the higher the temp.
as stated before, even 1 'old' 4300 is a lot brighter than my current 4300.
Will update with my findings when the arrive (hopefully today / tomorrow) and I get them fitted. (unless Mark wants my car before I get the chance)