Here’s what I could gather about her skills from around the web:

Illumination (passive): Lux’s damaging spells illuminate the target for 6 seconds. Lux’s next attack ignites the debuff, dealing 20-180 (depending on Lux’s level) magic damage to the target.

Light Binding (Q): Fires a ball of light towards a target location, binding the units hit for 2 seconds. The units take 80 magic damage. Can hit up to 2 targets with the 2nd target receiving 50 percent effect.

Lucent Singularity (W): Creates a zone that slows enemy units by 13 percent (zone lasts 5 seconds). Can be detonated to damage enemies in the area for 60 magic damage.

Prismatic Wave (E): Passive: Lux’s cooldowns are reduced by 3 percent. Active: Fires a wave to the target location and back, instantly stealthing any allied champions for 3 seconds. Lux is also struck by the wave upon return.

Final Sparkling (R): After a short delay, Lux fires a laser pulse in front of her dealing 250 damage to all enemy units in the area.

Let me just say, this is the most creative champion release in a long time. Invisibility for a whole team? Granted, it’s only three seconds, and it’s a skillshot buff, but it’s one of the most innovative things we’ve seen. The slow orb is also pretty interesting – think of it like a Gragas barrel with an AoE slow effect. On the whole, she sounds much better off than Swain, mostly because she can use all of her abilities from a safe distance.