An action with this trait requires a degree of mental concentration and discipline.
Light
Light effects overcome non-magical darkness in the area and can counteract magical darkness. You must usually target darkness magic with your light magic directly to counteract the darkness, but some light spells automatically attempt to counteract darkness.
Spellshape
Actions with the spellshape trait tweak the properties of your spells. You must use a spellshape action directly before casting the spell you want to alter. If you use any action (including free actions and reactions) other than casting a spell directly after, you waste the benefits of the spellshape action. Any additional effects added by a spellshape action are part of the spell's effect, not of the spellshape action itself.
Wizard
This indicates abilities from the wizard class.
Source: Player Core pg. 204
Your spells become a radiant display of light and color. If your next action is to Cast a Spell that doesn’t have the darkness trait, has no duration, and requires creatures to attempt a Reflex save, the spell explodes in a spray of scintillating lights, in addition to its other effects. Each creature that failed its Reflex save against the spell is dazzled for 1 round, and those who critically failed are instead blinded for 1 round.