Yeah, I was expecting a little brighter but it's allright, their color is actually purple as you know for a UV light and it makes my whole HD3870 glow bright red/orange!
If you have a bunch of UV reactive stuff in the case it really is worth the UV Cathode. Otherwise, the regular blue cathodes will bright the whole inside of your case!
Those exact same ones are only $10 at Circuit City! I got 2 of them in my case!! I never knew there would be a day when something would be cheaper at a store than online. LOL