Flare String

A bow string that can shoot a flare that gives off
light in a 20 ft radius. It drifts 10 ft to the
ground at the start of your turns.
The source of the light is immaterial; it can't be
picked up, thrown, carried, or moved in any
way after its initial launch or once it reaches the
ground.
It can be extinguished by the caster before the
end of the spell's duration as a bonus action.