Continual Flame

Artificer    Cleric    [Druid]    Wizard

Level 2 Evocation

Casting Time: 1 action
Range: Self
Components: V, S, M (ruby dust worth 50 gp, which the spell consumes)
Duration: Until dispelled

A flame, equivalent in brightness to a torch, springs forth from an object that you touch. The effect looks like a regular flame, but it creates no heat and doesn't use oxygen. A continual flame can be covered or hidden but not smothered or quenched.

Source: Player's Handbook, p. 227