Also known as troffers, these lights fit most standard drop-ceiling grids, so they’re often used in indoor spaces such as offices and storage rooms. They can be hardwired to operate on any of the voltages listed.

Lights with a solid lens are frosted and smooth or prismatic to disperse light evenly. With built-in LEDs, these lights last longer, are more efficient, and generate less heat than fluorescent lights. They emit a neutral white light often found in workspaces.

Lights with a parabolic lens are reflective to direct light downward and reduce glare. They require fluorescent bulbs (sold separately).