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.
Linear fluorescent bulbs, also known as fluorescent tubes, are more energy efficient than incandescents or halogens because they don't produce much heat. These are the thin, long tube lights often found in kitchens for under-cabinet lighting, or in garages, workshops, and basements.