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.
The two most common types of lighting fixtures today are incandescent bulbs and fluorescent lamps. Incandescent bulbs are rather old and outdated while fluorescent lamps are relatively new and is replacing incandescent bulbs in a lot of applications. The biggest difference between the two is in how they produce light.Incandescent bulbs produce light by a heating a metallic filament until it starts to radiate light. On the other hand, fluorescent lamps produce light by exciting a gas and causing it to glow.ome people do prefer the warm light produced by incandescent bulbs, which is more like the light from the sun, compared to the clinical white light produced by fluorescents. Summary: 1. Incandescent bulbs produces light from a heated filament while fluorescent lamps produce light by way of a gas discharge. 2.