A flush mounted light fixture is mounted to a ceiling. The fixture hugs close to the ceiling, usually without any gap between the ceiling and the light shade. A close-to-ceiling fixture can work well as a central light fixture, ideal in smaller rooms and hallways where there is less head-room. A flush-mount fixture provides maximum head-room, though tend to be less decorative than a semi-flush fixture. These lights are hardwired and must be installed electrically, operated by a wall switch. They produce good ambient light, although a larger room may need more than one.
Fixtures closely attached to a ceiling tend to produce more ambient background light. They might be used to support a more central light fixture or as a less elaborate central light. They can produce strong light near to where they are placed. A close-to-ceiling light can flood a room with ambient light.
Being fairly low-profile, flush mounts are often found in smaller or narrower rooms. They work well in a hallway, bathroom or smaller bedroom. They can also work well in a basement or rooms with less headroom.
Being flush-to-the-ceiling, these lights will radiate light outward and downward. They can light a large area, but you should also consider wall lights or lamps to fill out the edges or corners of the room, and to provide softer light for more relaxed situations.
Attaches to a flat ceiling. Could potentially be mounted to a sloped/vaulted ceiling. The flush-mount canopy area hides the electrical installation.
An electrician or person with electrical installation knowledge will need to permanently wire the flush-mount fixture into the building's electrical supply.