Abstract: A message sign includes a panel having a plurality of ribs each defining an interior channel. The plurality of ribs are preferably spaced apart in parallel relationship. At least one lamp is secured through an opening in at least one of the ribs. In one preferred embodiment, the message sign includes a first and second panel, each preferably including a base web, wherein the ribs of the first and second panels extend outwardly from the base web of the respective panels. The base webs of the first and second panels are abutted with the ribs thereof extending outwardly therefrom in opposite directions. The first and second panels are oriented such that at least some of the channels of the first panel cross at least some of the channels of the second panel and form a plurality of junctures of crossing channels. Preferably, at least one lamp is secured through an opening in at least one of the plurality of ribs at one of the junctures. A method of manufacturing a message sign is also provided.