It's tragic, really, that this name has become so unusable; I agree that it has a beautiful sound and wonderful meaning. As an atheist, the association with
Satan doesn't hold much sway with me personally, but I still wouldn't use
Lucifer because of the trouble it would undoubtably cause its bearer. I've never lived anywhere but the US, but I doubt you could get away with it in any other countries either. For now I'm content with
Lucius, which I love anyway. Perhaps you could use it or
Lucian instead of
Lucifer. Similar meanings and sounds, but without the devil connotations.