Ceiling module

An advertising display module for use with suspended ceilings having spaced-apart grid members defining panel receiving areas, ceiling panels removably supported by said grid members in said panel receiving areas and lighting fixtures disposed in cooperative working relationship with pre-determined ones of said ceiling panels, said advertising display module being co-extensive in area with the respective ones of said panel receiving areas and supported by said grid members defining the respective ones of said panel receiving areas, whereby one or more of said advertising display modules can be removably disposed in conjunction with or in substitution for any one of said ceiling panels to provide readily visible advertising, said advertising display module comprising a hollow enclosure formed by a plurality of walls, at least some of which depend downward with respect to said suspending ceiling and provide surfaces for receiving thereon indicia, and indicia on at least one of said surfaces, and securement means comprising a clip removably secured to said grid member and having a shoulder forming a support surface upon which said peripheral rim seats to support said module from said grid members.