Compact fluorescent lamp(redirected from Spiral bulb)
fluorescent bulbA light source consisting of a long glass tube containing mercury in a partial vacuum. Available in many lengths and several diameters, the tube is lined with a fluorescent phosphor. When the mercury is excited by electricity, it emits ultraviolet (UV) light, which causes the phosphor to emit visible light. Fluorescent lamps have been widely used in commercial buildings for decades, because they use considerably less power and last much longer than incandescent lighting. However, due to their tubular design and cooler color temperatures, they have not been generally welcome in the home.
The Compact Fluorescent Lamp (CFL)
Compact fluorescents are designed to replace the standard incandescent bulb and screw into everyday table lamps and lighting fixtures. They are available in soft, warm hues like incandescent bulbs. See fluorescence, incandescent bulb, halogen bulb, LED bulb and color temperature.
|CFL Coils and U's|
|Instead of straight tubes, coiled and U-shaped CFL tubes screw into the standard Edison base in incandescent lamps and fixtures. See Edison base.|
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
Compact fluorescent lamp
Fluorescent light bulb in which the tube is folded or twisted into a spiral to concentrate the light output. Compact fluorescent lamps (CFLs) are typically three to four times as efficient as incandescent light bulbs and last 8–10 times as long. CFLs combine the efficiency of fluorescent light with the convenience of an Edison or screw-in base, and new types have been developed that better mimic the light quality of incandescents. Not all CFLs can be dimmed, and frequent on-off cycling can shorten their life. Concerns have been raised over the mercury content of CFLs, and though they have been deemed safe, proper recycling and disposal are encouraged.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved