Nebulous
Legend
As I said. Too many races have DV. With level restrictions I would not mind, but since those days are over, then there must be some drawback to DV. The drawback that I enforce is if a bright light source is brought up suddenly, you are blinded until you make a con save (at the end of your turn) to end the effect. The save is usually easy at 13. Most characters only need a 11 or better to save.
No save is required if you are in the dim light radius. This alone makes up for interesting tactics from the players and the monsters.
The only drawback from this that I see is that PCs will use this tactic 100% of the time against enemies. "Get the hood lantern ready, shield your eyes guys, and....GO" All enemies blinded, PCs attack. My guys would abuse the crap out of that.