Hi, I'm new on MOBAFIRE and this is my first guide :D I really love to play Lux, and i made this guide just for fun, to see how this works :DD

For keystone i use Summon Aery, its really powerfull and cute. It goes well on Lux. It improves your Prismatic Barrier on 1 ally, and deals damage to enemy champion with your other spells.

I choose The Ultimate Hat because you use your Final Spark a lot with Lux, and your cooldown will be so low, and you can burst targets very often.

Transcendence for more CDR

Scorch for extra damage

Biscuit Delivery for more sustain

Cosmic Insight is just for more, and more cooldown xD

Flash is really good for Lux, she doesnt have any escape, so Flash is really important on her, you can catch enemies with Flash and Light Binding combo too.

Barrier is good because Lux is range champion and she cant come so close to use Ignite for example. Barrier will help you a lot in game, and you can really surprise enemies with Barrier.

You can also use Heal, Exhaust vs assassins and Cleanse if enemy have hard cc.

Your job in teamfight is to poke all enemy champions, shield ally champions and to burst squishy targets. Stealing dragon and Baron Nashor will be really usefull, because Lux have very high range with Final Spark

This is not really usefull guide, its just my first try. I hope you will have fun while reading this. Feel free to correct me and give your opinion. I had a lot of fun! :DDD