This modular luminaire can be fully installed, relocated, serviced, and modified in place without tools. Its plug-and-play technology allows lamp quality to be increased or decreased, lamps to be swapped from T5 to T8, ballasts to be replaced, and lensing to be changed. It can be modified from an acrylic lens to a parabolic louver or a recessed indirect luminaire and offers up to 12 different lamp configurations in the standard direct fixture and an additional nine in the direct/indirect fixture.