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 and hidden but not smothered or quenched.
Light spells counter and dispel darkness spells of an equal or lower level.
You sprinkle ruby dust (worth 50 gp) on the item that is to carry the flame.