what type of material can the fixture be mounted to on the ceiling?

Based on the installation instructions for Model FMLWL, this fixture is designed to be mounted to a structurally sound ceiling surface that can support its weight. Common suitable materials include: Wood joists or beams (ideal for direct screw mounting) Metal framing (using appropriate screws or anchors) Drywall or plaster ceilings (only if you use proper anchors rated for the fixture’s weight) The key is to ensure the mounting surface can hold the fixture securely and that you follow the instructions for using the provided mounting brackets and hardware.