Here are my simple readings of Light vs. Continual Light:
Everything within a 30-foot circle glows, illuminating the area for an hour + 10 minutes per caster level. Objects removed from the target area stop glowing, so the light is non-mobile. Since everything in the area glows, the light cannot be blocked, nor are there any shadows, but it’s only as bright as a candle.
Everything within a 240-foot circle glows, illuminating the area indefinitely. Every day at sunrise and sunset, there is a 5+ on 1d6 chance the spell effect ends. Otherwise, it lasts until dispelled. The light is as bright as daylight. It is otherwise identical to Light.
Since neither Light nor Continual Light are mobile, other spells would fill that role.
Magic Candle (2nd Level)
Creates a light as bright as a candle that floats in air and last as long as the caster maintains it, up to 10 x 2d6 minutes. The light only moves when the caster concentrates on it, but when it is stationary, the caster is free to do other things.
Enchanted Light (2nd Level)
Causes an object to emit light as bright as a torch for 10 x 2d6 minutes. It can’t be used to burn things or start fires, but on the other hand, it can’t be extinguished by water and can be covered up like a lantern.
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