Loisteputkilla

Loisteputkilla, scientifically known as fluorescent tubes, are a type of electric discharge lamp that utilizes fluorescence to produce visible light. They consist of a glass tube filled with a low-pressure inert gas, typically argon, and a small amount of mercury vapor. The inside of the tube is coated with a phosphor material. When an electric current is passed through the gas, it excites the mercury vapor, causing it to emit ultraviolet (UV) radiation. This UV radiation then strikes the phosphor coating, which absorbs the UV energy and re-emits it as visible light.

Fluorescent tubes are widely used for general lighting purposes in homes, offices, and commercial spaces due to their energy efficiency compared to incandescent bulbs. They produce less heat and have a longer lifespan. The color of the light emitted can be varied by using different phosphor coatings, leading to options like cool white, warm white, and daylight.

The operation of a fluorescent tube requires a ballast, which is an electrical component that provides the initial high voltage needed to start the discharge and then regulates the current flowing through the tube. Older systems used magnetic ballasts, while modern systems often employ electronic ballasts, which are more efficient and can provide flicker-free operation. Despite their advantages, fluorescent tubes contain small amounts of mercury, which requires careful disposal to prevent environmental contamination. Newer LED technology is increasingly replacing fluorescent lighting in many applications.