Lux is a really funny champ in the league, playing as her will make this game much more funnier.

Oppning with boots and pots is always the right way to start a game.
KLP for the GP5 and the small AP.
Alot of players like to get the magic pen shoes thingy to lux
but I hardly recommend the CDR boots for her awesome ultimate.

When playing as lux you kinda want that (ap per level) thingy runes.
I recommand to chill and stay by the turret to farm for late game or level 6.
When you reach level 6 its just game on and shot those other champing directly in their faces.

Lux is a really strong late game champ.
The ultimate isnt that long CD with the CDR boots and the Grasp.

Lux is the perfect champ for you if you can farm corectly and take it chill until late game.

If someone in your team fks the game up you can use your ultimate for a great revenge.
Have fun playing her :)