Many lighting fixtures can improve the lighting of any room. Overhead lighting requires a ceiling body or a group of luminaires that can transmit light through the intended area. Work, ambiance, and accent lighting are provided by small ceiling or wall bodies that illuminate certain areas. Recessed, pendants, chandeliers, and fan/light combinations are mounted on the ceiling using standard switches and fittings, and the candlesticks are mounted on the walls in the same way. Recessed and rail lighting requires special equipment and installation procedures, depending on the type and configuration of the luminaire. All permanent lights require power and switch wiring, so in the absence of existing service, an electrician must direct the wiring from the electrical panel to the installation and switch locations.