Define CFL.

CFL stands for Compact Fluorescent Lamp. It is a type of energy-efficient lighting technology that has gained popularity as a more environmentally friendly alternative to traditional incandescent bulbs. CFLs work by passing an electric current through a tube containing argon and a small amount of mercury vapor. This excites the mercury atoms, producing ultraviolet (UV) light. The UV light then interacts with a phosphor coating on the inside of the tube, causing it to fluoresce and emit visible light.

One of the key advantages of CFLs is their energy efficiency. They consume significantly less electricity than incandescent bulbs to produce the same amount of light, resulting in lower energy bills and reduced environmental impact. CFLs typically use about 75% less energy and last up to 10 times longer than traditional incandescent bulbs. This longer lifespan also means fewer bulbs need to be manufactured and disposed of, further reducing environmental impact.

However, CFLs do have some drawbacks. They may take a moment to reach full brightness after being turned on, and they can be sensitive to extreme temperatures, which can affect their performance. Additionally, CFLs contain small amounts of mercury, which can be harmful if released into the environment. Proper disposal of CFLs is therefore important to prevent mercury pollution.

Overall, CFLs offer a more energy-efficient lighting option compared to incandescent bulbs, helping to reduce energy consumption and greenhouse gas emissions. However, advancements in LED technology have surpassed CFLs in recent years, offering even greater energy efficiency, longer lifespan, and improved performance.