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Lights designed to provide general illumination on a surface to facilitate different tasks (e.g., reading) and are mounted on fixtures (e.g., lamps) fixed to the ceiling. These lights convert electric power into emitted radiation, typically in a wavelength range that includes the visible spectrum. These lights are available in several shapes and sizes and use various types of bulbs such as incandescent, compact fluorescent lamps (CFL), halogen, light-emitting diodes (LED), and fluorescent tubes (e.g., straight and circular).
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