User blog comment:Ozuar/The Importance of Skill Order in League of Legends/@comment-3476718-20130330081157

When I play Lux in mid (which I do unless I go support), I usually take a point in first, then immediately max  after that. Why I do this is because her skills have very low damage potential early game, and must be maxed as soon as possible in order to make her half decent at getting kills in mid (or at least forcing the enemy to back off).

I don't take points in at all until  is maxed becuase Lux can harass from a range, making her very safe from most champions (sans mid assassins like ). Plus, her barrier is a support skill, which she does not need for mid.

For side lanes, though, Lux must make use of her is order to support her laning partner, and does not need the maxed harass from  to land kills (your fighter/carry will be doing that). Here, I take varying points in skills to adapt to the nature of the lane.