How a Fluorescent Light makes Light?

How a Fluorescent Light makes Light?

Lighting Fundamentals

Fluorescent Lamps
Fluorescent Lamps

As we mentioned in artificial light FAQs, a Fluorescent Light makes light in two separate steps; electricity causes mercury vapor to emit UV light, the UV light strikes the Phosphor inner lining and causes the Phosphor to emit visible light. In both cases, the same mechanisms of Energy-Atom-Electron-Photon are in effect.

1. Electricity warms the tube.
2. Mercury turns to vapor.
3. Vapor excited by further electricity and UV light is emitted.
4. UV light hits the inside surface of tube, which is coated with Phosphor material, which then glows (emits light) - Using light (UV light) to make light (visible light).
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Related FAQ
Let's have an over view of the 3 common types of artificial light. The traditional Incandescent bulbs were first on the scene. Next, came the Fluorescent Lights and then LED Lights, both bringing advantages in bulb lifespan and energy savings. However, they are all three, still in use with their own distinct advantages and disadvantages. Read More
Incandescent lighting uses heat (thermal radiation) to produce light. Sunlight and Candle light are generated in this way. Incandescent Light Bulbs also generate heat (thermal radiation) through a "filament". The filament heats up to produce light like a candle. Read More
Fluorescent Lights have been commercially available since the 1930s as long Fluorescent Tubes. A smaller bulb like CFL (Compact Fluorescent Light) only became widely available in the 2000s. These lights use a mercury vapor (steam) inside the tube; electricity is applied within the tube, which causes the mercury vapor to emit UV light, or more accurately UV radiation. The UV radiation hits the inside surface of the tube which is coated with a phosphor material. The UV radiation causes the phosphor to glow. Read More
Early LEDs (Light Emitting Diodes) were used mainly for small indicator lights for applications like display panels, they have been used in this way since the 1960s and they looked like the bulbs as below picture. Read More
Practically and economically speaking, LEDs seem to have a huge advantage and this is why most newly built facilities in developing countries are choosing LEDs for most of their environment lighting (e.g. factories, offices, libraries, museums). Read More
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UPRtek How a Fluorescent Light makes Light? Introduction

United Power Research Technology Corp. is Taiwan supplier and manufacturer in Optoelectronics Industry. UPRtek has been offering our customers high quality Spectrometer, Color Meter, Spectral PAR Meter, Spectral Color Meter, Spectrum, LED Meter, Spectradiometer, LED Measurement, LED light testing since 2010. With both advanced technology and 8 years experience, UPRtek always make sure to meet each customer's demand.

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