Originally Posted by Mister Sandbag
You run clarity, which is bad by itself.
If you don't have blue as a mana champion you will lose lane to an opponent who gets it 100% unless they misplay or you get a really fast Athene's (and even then it's dicey) because they can just push to your tower over and over until you run oom. The only champions that don't need blue very much are either manaless (although the CD still helps them quite a bit) or champions that autolose lane and plan on just roaming for kills rather than staying to push.
Clarity has always been a niche choice when it comes to champs, but I find with lux that it leads to some great plays early game WITHOUT having to rely on blue buff to do well, and end game, without baron, you can give people a good chunk of mana back to help with a push.
Call it what you want, but Im sitting on a 50% win rate with lux 5/5/8 average - which aint too shabby. And thats not counting the great normals Ive played with her.