Light fixtures, also known as luminaires, come in a variety of sizes, shapes, wattage, etc. The diagram below shows the major types of fixtures. Obviously, there are many varieties of each type of fixture.
Descriptions of the types of fixtures are listed below the diagram.
Recessed Cove Lighting Fixture
A recessed cove fixture is mounted in a light cove, which is built above the ceiling at the intersection of the ceiling and the wall. These fixtures typically direct the light toward the wall. It is important that trim at the edge of the cove is tall enough to hide the lighting fixture otherwise the lamp may be visible, which is unappealing.
Indirect Pendant Lighting Fixture
Indirect pendants hang from the ceiling and are usually suspended from cables. The lamp is completely hidden from below and a reflector directs all of the light up toward the ceiling. This type of fixture offers a softer and more even distribution of light within the space. It is best used for general lighting and is not appropriate for task lighting. The ceiling color should be light so that it reflects as much light as possible.
Direct / Indirect Pendant Lighting Fixture
A direct / indirect pendant also hangs from the ceiling, but it directs light up and down. These types of fixtures are used a lot in offices where general lighting is required, but there is also a need for task lighting immediately below the fixture. Direct / indirect fixtures are designed in variations that distribute differing amounts of light up and down so that a designer has control over the light distribution.
Recessed Lighting Fixtures
Recessed lighting fixtures are the most common fixtures used in commercial and institutional construction. Fixtures are sized to work with common ceiling tile sizes. While fluorescent lamps have been most popular in the past, many facilities are shifting to LED fixtures because they last longer and require less maintenance.
Wall Wash Light Fixtures
Wall wash fixtures are recessed lights with reflectors that direct the light toward the wall. They are most often used to highlight art, signage, or other items on a wall.
A wall sconce is a decorative fixture that is mounted to a wall. They provide general room lighting, but are mostly decorative.
Task lighting is a generic description for lights that are used to illuminate specific tasks or work that is being done. Task lights can be lamps, lights mounted to desks, under cabinet lights, or any lighting that helps people see their work better.
Under Cabinet Light Fixtures
Lights are often mounted below cabinets so that tasks on the counter below can be seen easily. These can be found in homes and offices and are generally controlled from a nearby switch or a switch on the light fixture.
CSI MasterFormat Divisions
Interior Lighting: 26 51 00
Interior Lighting Fixtures, Lamps, And Ballasts: 26 51 13