A preamble is usually used for formal documents; you wouldn't include one in a text to your best friend. noun-A preliminary statement, especially the introduction to a formal document that serves to explain its purpose. noun-An introductory occurrence or fact; a preliminary.
Screw-in types can be used in place of incandescents in standard lamp sockets. Available in a wide spectrum of colors. Warm white tones best duplicate the color of incandescents. Today's fluorescent bulbs come in a wide selection of sizes and can produce warm tones of light similar to those of incandescents.
Light fixture - Fixture types. 1  Light fixtures are classified by how the fixture is installed, the light function or lamp type. 2  Table lamp fixtures, standard lamp fixtures, and office task light luminaires. 3  Floor Lamp Torch lamp or torchiÃ¨res are floor lamps with an upward facing shade. 4  Bouillotte lamp: see Bouillotte.