My Wizard player asked me if she could use her light spell to blind enemies. I couldn't find anything saying yes or no, so now I ask the minds here for an answer.
The DMG advises you to say yes to players when they do something that the rules don't cover, using page 42 to adjudicate it.
I would let the PC cast Light and make an Int vs. Fort attack. (Maybe Will or Ref, depends on how the player describes it!)
Then I would decide what effect "blinding" will have - basically, how good the Wizard can blind someone with Light.
I've looked through the PHB at powers that do "blinding" sort of things. This seems like a good guideline:
Code:
Level.....Effect
1-2.......-2 to attacks until then end of your next turn
3-12......Dazed until the end of your next turn
13+.......Blinded until the end of your next turn
Or basically, you have a new power like this:
Blinding Light
At-Will ♦ Arcane
Standard Action Ranged 5
Target: One creature
Attack: Intelligence vs. Fortitude
Hit: The target takes a -2 penalty to attacks until the end of your next turn.
Change to the target is dazed until the end of your next turn at level 3.
Change to the target is blinded until the end of your next turn at level 13.
Special: You can use this power multiple times per encounter, but only once on each target.