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.
Halogen bulbs produce a bright white light. They become much, much hotter than other types of bulbs and should not be used near combustible materials or touched during or shortly after use. Fluorescent: These tube-shaped lights are often used as overhead lighting for large areas such as retail stores or home basements.
Electricity usage of a CFL Light Bulb. A CFL light bulb is also known as a compact fluorescent lamp or a compact fluorescent light, they were made to replace incandescent light bulbs. CFLs use 1/3rd to 1/5th the electrical power of incandescent lighting and can last 8 to 15 times longer.