Abstract: A modular, fluorescent, indirect lighting system which may be easily mounted to most surfaces by the user, without any technical knowledge or experience, using just a screwdriver and measuring tape. The system is comprised of a family of plug-in modules, each of which contain an integral power bus (84 and 86), that provides power continuity to the adjacent module, and a gender conversion plug (42) that allows the installer to configure each module so that power is supplied only from female connectors. The system includes a power source module (110) and three sizes of illumination modules (156, 158 and 52), which house single 20, 30 or 40 watt lamps, as well as inside and outside corner modules (118 and 122) and both straight and corner adjustable-length modules (128 and 148). Modules selected from this family can be plugged together to create a cove lighting system for a room of almost any size or shape. The complete installation is powered by a neat line cord (116) plugged into a standard wall outlet.