A recessed can, also known as a can light, is a type of lighting fixture that is installed flush with the ceiling or wall, creating a clean and streamlined look. It consists of two main components: the housing and the trim. The housing of a recessed can is typically made of metal and is designed to be installed within the ceiling or wall. It is the portion of the fixture that is not visible and provides the structural support. The trim, on the other hand, is the visible part of the fixture that covers the opening in the ceiling or wall. It can come in various styles and finishes to match the aesthetic of the space.