A wagering game is operable on a reel-based gaming machine which has the capability to selectively illuminate one or more reels with one or more colors of graduating intensity. In conjunction with the stopping sequence of the reels for a given play of the wagering game, the gaming machine provides a distinctive lighting effect at one or more of the reels when a reel in the set is stopped showing a predefined symbol. The predefined symbol presents the possibility of some desirable outcome for the given play of the wagering game depending upon the positions in which the remaining reels in the set stop.