A Light Weapon is a one-handed weapon that is 24 inches long or less.
A Light Weapon can be a dagger, hatchet, or any other small weapon not designed for throwing.
Any character can wield a Light Weapon.
You must have one of the Abjurer or Armsmaster Abilities to wield a Light Weapon in one hand and another Weapon or Implement in your other hand.
You cannot use Techniques such as Cleaving Blow with a Light Weapon unless it is enchanted to let you do so.
If you are wielding a Light Weapon in the shape of a Dagger, you can cast Spells through it, either when attacking a target or empowering an ally.