Compact fluorescent lamp

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fluorescent bulb

A 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.

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.
References in periodicals archive ?
Thorn Lighting at Newton Aycliffe, the UK's largest manufacturer of low-energy fluorescent bulbs, invested pounds 3m in new research and development labs last month where staff are working on eco bulb organic LED (light emitting diodes) technology.
Eco bulbs are not only better for the planet, they also save you money.
And Oliver, whose new book, Urban Eco Chic, is a practical guide to creating an eco home that's as beautiful as it is green, dismissively swats away criticisms that the light from eco bulbs is often dim and far from instant.
The father of two young daughters is chatting at his new house in Brighton, where eco bulbs are just part of an ambitious 'green plan' which will transform it into an eco sanctuary for his family.
And Oliver, whose new book Urban Eco Chic is a practical guide to creating an eco home that's as beautiful as it is green, dismissively swats away criticisms that the light from eco bulbs is often dim and far from instant.