One creature/level; no two of which can be more than 30 ft. apart
Instantaneous
Will half (harmless) or Will half; see text
Yes (harmless) or Yes; see text
You channel positive energy to cure 1d8 points of damage +1 point per caster level (maximum +25) in each selected creature.
Like other cure spells, mass cure light wounds deals damage to undead in its area rather than curing them. Each affected undead may attempt a Will save for half damage.