Scenario question

[gdanes]

Say a group of adventures whom some have the dark vision ability are fighting in a 60 foot area covered by the deeper darkness spell causing the area to be supernaturally dark. Said adventurers cast farie fire on enemy goblins inside this darkness. So the goblins are now lighting everything next to them to regular darkness levels as if they were holding a candle. What type of penalties should everyone get? Should anyone out of the light of farie fire get 50% concealment and anyone next to the goblins in regular darkness gets 20% concealment? Also would the characters without dark vision suffer the fighting while blinded penalties? I'm asking this because there are two drow nobles in the adventuring party and they're going to start off every encounter with farie fire on enemies and deeper darkness on everyone. So I'm trying to find ways to deal with this without having to make them regular drow (because they'll while a bunch).

[Tanis]

Anyone (including the drow) within the radius of the Deeper Darkness has a 50% concealment miss chance and are effectively blinded. Faerie Fire does nothing in the radius of a 2nd-level or higher magical darkness effect (as per spell desc.).

Creatures without DV are blinded as above in normal Darkness, but Faerie Fire will work, providing dim light (20% miss chance against those without DV).

Noble drow huh? Don't worry too much, their shortcomings will be apparent once they hit the surface.