A drop ceiling light is overhead light fixture that is laid or clipped into the metal grid of a drop ceiling. A drop ceiling is a secondary ceiling that is hung below the main structural ceiling of a building. Also known as a suspended ceiling, false ceiling, grid ceiling or T-bar ceiling, a drop ceiling consists of ceiling tiles supported by aluminum or steel frames that run in a grid pattern across the room. The ceiling grid system creates a plenum space above the secondary ceiling that can accommodate the constant change in space requirements, electrical wiring, lighting layouts, air duct relocations while providing a clean ceiling aesthetics and acoustic absorption. Suspended ceilings are very popular in offices, schools, hospitals, retail spaces and commercial structures.