Kompaktilamppu

Kompaktilamppu, commonly known as a compact fluorescent lamp (CFL), is a type of fluorescent lamp designed to fit into standard light sockets, replacing incandescent bulbs. It operates on the same principle as traditional fluorescent tubes, utilizing an electric current to excite mercury vapor, which then produces ultraviolet light. This UV light strikes a phosphor coating on the inside of the glass tube, causing it to emit visible light. The key innovation of the compact design lies in integrating the ballast, the component that regulates the electrical current, directly into the lamp base. This eliminates the need for an external ballast, making it a direct replacement for incandescent bulbs.

CFLs are significantly more energy-efficient than incandescent bulbs, consuming roughly 75% less electricity to produce the same amount of light. They also have a much longer lifespan, typically lasting between 6,000 and 15,000 hours compared to the 1,000 hours of an incandescent bulb. This longevity and energy saving translate into reduced electricity bills and less frequent bulb replacements. However, CFLs contain a small amount of mercury, which requires special disposal procedures to prevent environmental contamination. Early CFLs also had a slower warm-up time, meaning they didn't reach full brightness immediately upon switching on, although this has been greatly improved in newer models. The color rendering quality of CFLs has also advanced, offering a range of color temperatures to suit different lighting needs.