Lighting fixtures marked "Recessed Fluorescent Luminaire" are permitted in what type of ceiling?

Recessed fluorescent luminaires are specifically designed to be installed in ceilings where they can be recessed into the structure. This functionality is particularly suitable for suspended ceilings, which consist of tiles or panels that are hung from a metal grid system. This allows for easy access to the fixtures for maintenance and bulb replacement, as well as accommodating wiring without obstructing the structural integrity of the ceiling.

Suspended ceilings are ideally suited for this type of lighting because the construction allows for the fixtures to be integrated into the ceiling profile while providing the necessary clearance and support. This ensures that the luminaires can fit securely and maintain a clean, finished appearance without interfering with the ceiling’s design or functionality.

While terms like acoustic ceiling or drop ceiling are sometimes used interchangeably with suspended ceiling, they typically describe specific features or purposes of the ceiling tiles themselves, rather than indicating the structural setup necessary for recessed lighting installations. Therefore, the most accurate choice in the context of where recessed fluorescent luminaires are appropriately installed is a suspended ceiling.