Get Wired 102 Introduction To The Basic Installation Of Lighting Fixtures And Branch Circuits Practice Test

When you’re mounting fluorescent luminaires on the ceiling, you want a finish that is lightweight, easy to cut around for fixture openings, and provides a smooth, reliable backing for the fixture hardware. Low-density cellulose fiberboard fits this need well: it’s thin, inexpensive, and easy to shape so you can create clean openings for the luminaires without adding a lot of weight or requiring heavy framing. This makes installation straightforward and keeps the ceiling surface uniform for the fixtures' mounting and diffusers. By contrast, heavier materials like gypsum board, masonite, or plywood are tougher to cut precisely around multiple fixtures, can add unwanted weight, and may be more prone to cracking or warping around openings, making them less convenient for recreation room ceilings with surface-mounted luminaires.