If one were to forget to light candles on Yom Tov eve, but remembers the next morning - can s/he still fulfill his obligation to light candles during Yom Tov day with a Brocha?
(Being daytime, it will only be tosefes oir, and may only be valid if done by the seuda, where the increased lighting is considered valid - the same as lighting by night when there are already lights in the room.)