Fluorescensstrålarna

Fluorescensstrålarna, also known as fluorescent lamps, are a type of electric light that uses fluorescence to produce visible light. They are a form of gas-discharge lamp, similar to neon lamps, but with a different gas mixture and a different mechanism for producing light. The term "fluorescent" refers to the fact that the light is produced by fluorescence, a process where a substance absorbs energy and then re-emits it as light.

Fluorescent lamps consist of a glass tube filled with a low-pressure mercury vapor and a small amount of an inert gas such as argon or krypton. The tube contains a phosphor coating on the inside, which is a substance that emits visible light when excited by ultraviolet radiation. When an electric current is passed through the tube, it ionizes the mercury vapor, causing the mercury atoms to emit ultraviolet photons. These ultraviolet photons then strike the phosphor coating, exciting it and causing it to emit visible light.

Fluorescent lamps are known for their energy efficiency and long lifespan. They can produce a high level of light output for a relatively low amount of energy, making them a popular choice for commercial and industrial lighting. They also have a long lifespan, with some models lasting up to 20,000 hours or more. However, they do have some drawbacks, including a longer startup time compared to incandescent lamps and a more complex design that can make them more expensive to manufacture.