φέγγος [2 verses] (noun sg neut acc) "Light" is pheggos, which means "light," "splendor," "luster," "moonlight," "day," and "light" as a metaphor for glory, pride, and joy.  -- (WW) "Light" is from a noun that means "light," "splendor," and "luster," but it is not the root word usually translated as "light." It is a more complex worth with the sense of "brightness" and "shining."  It is used as a metaphor for glory, pride, and joy. However, this is not the common Greek word translated as "light." This word is only used here and in the parallel in Mark, In the OT, where this word is used a little over a dozen times, it is translated usually as "brightness" and in Joel as "shining" where it is a reference to the Hebrew word nogahh.