A fluorescent lamp is a type of gas discharge lamp that produces light through the process known as fluorescence . Instead of a filament like incandescent bulbs, a fluorescent lamp uses a gas mixture (usually mercury vapor) excited by an electric current. This produces ultraviolet (UV) light, which is then converted into visible light by a phosphor coating inside the lamp.
Some features of fluorescent lamps:
- Energy Efficient : Fluorescent light bulbs are much more efficient than traditional incandescent bulbs because they use less energy to produce the same amount of light.
- Longer life : They usually last much longer than incandescent bulbs, often up to 10,000 hours, depending on the type.
- Colour temperature and light colour : They are available in different colour temperatures, from cool white (for workplaces) to warm white (for a more cosy atmosphere).
- In different shapes : Fluorescent lamps are available in different shapes, such as the traditional tubes, but also in compact versions (CFLs), which can serve as a replacement for incandescent bulbs.
One disadvantage of fluorescent lamps is that they contain mercury , making it important to recycle them properly when they break or no longer work.
Fluorescent lamps are often used for general lighting in offices, workspaces, and public buildings because of their energy efficiency and long lifespan. However, they are increasingly being replaced by LED lighting, which is even more efficient and environmentally friendly.