The name Lux is a girl's name of Latin origin meaning "light". Lux and is often added to lists like Best Cool Unusual Girls' Names and discussed in our forums with posts like "Think/Say".
From the experts:
This name of a character played by Kirsten Dunst in the movie Virgin Suicides, originally a novel by Jeffrey Eugenides, is gaining attention, also thanks to the heroine Lux, Lady of Luminosity in the League of Legends games. Luz is the Spanish version.