Nystul's Dancing Werelight

This spell creates a mote of light completely under the caster's control. The light shed by the mote can be increased or decreased at the caster's will, ranging from the brightness of a light spell to the dim glow of a candle. The werelight can flit about from place to place as the caster directs, as long as it stays within the range of the spell. The werelight can be called upon to hang over the caster's head as a convenient reading light. The werelight spell cannot be attached to an object or creature. It can exist only as a mote hanging in the air.

The material component is a live firefly.