Lux. One of the most favored, and all around powerful AP champ. But however I believe Lux is also an extremely powerful AD/Crit damage champion.

For an AD/Crit Damage Lux, I strongly suggest Critical Chance % Marks, Seals, And Glyphs for that extra Critical % chance. As for Quintessences I chose to get Critical Damage runes, for the shear reason they only cost 1050 ip, which makes for a bit extra damage early game.

For masteries I pick up a high 21/0/9 Mastery Page, going for a High availability of Critical Damage, and extra bonuses with these utilities.

Brawlers Gloves: 8% Critical Chance, Is very useful early game with runes and masteries will total your Critical Chance in the close proximity 20-23% Critical Chance at level 1.

Zeal: The following item After Brawlers Gloves, It enhances attack speed, movement speed, and critical chance, Which makes it very useful when combined with Light Binding for Easy Escapes.

Boots (Berzerkers Grieves / Boots of Swiftness): Berzerker grieves add for that extra attack speed when attacking enemies adds for that extra damage you will output. However Boots of Swiftness is also a strong option for those Lux's that tend to be very slippery and hard to kill.

Infinities Edge: The Bread and Butter Critical Damage item that Any AD Champion needs.

Black Cleaver: When combined with Infinities edge it will make every 3rd hit Unbearable and ridiculous, Along with the Attack speed bonus which comes along with Black Cleaver, I Find it very useful.

BloodThirster: The point in the game where Your Damage starts To hit in the higher 800s-1000, and the bonus lifesteal starts to become insanely amazing, along with the enhanced damage which comes along with every stack.

Directly After Bloodthirster Should come an Upgrade to your Zeal into a Phantom Dancer: Virtually a better zeal.

The Last Item On the build is strictly up to you. Your basic attacks will output tons of damage when used correctly, so I would recommend Building an Item like Banshees vail, or anything that increases health amounts.

Early Game to get your maximum amount of kills, you need to directly space out your skill sequence as your skills will still be used playing AD Lux. With Her skills still being pretty powerful early game, you should have no problem dealing extra woooop-*** damage. Skills should be used casting either your Light Binding, or Lucient Singularity. However you should never cast these two skills directly after eachother, always space these skills with an Auto Attack to tick your passive damage. The same goes with your ultimate.

However, when building AD Lux, Remember she was intended to be a caster, so she WILL still be squishy and easy to kill, So I strongly recommend the summoner skills Flash and Ghost, just to be a little more slippery, and harder to kill, for a higher survival chance.