The History of Fluorescent Lamp

Fluorescent Lamp, traditional low-pressure mercury lamp that is the use of low-pressure mercury vapor after the release of ultraviolet light in the power through electronic fluorescent starter, so that the principle of fluorescent light emitting light, so it belongs to low-pressure arc discharge light source. In 1974, the Netherlands first successfully developed will be able to issue the human eye sensitive red, green and blue light three phosphors. Three primary colors (also known as the three primary colors) phosphor development and application of the history of the development of fluorescent lamps is an important milestone.
The electrodeless lamp is the electrodeless lamp, which eliminates the filament and the electrode of the traditional fluorescent lamp. The principle of electromagnetic coupling is used to make the mercury atom excited from the original state, and its luminous principle is similar to the traditional fluorescent lamp. It has long life, Good color rendering and so on.
After the 20th century, 50 years, most of the use of fluorescent halogen calcium phosphate, commonly known as halogen powder. Halogen powder is cheap, but the luminous efficiency is not high enough, poor thermal stability, light fades large, low luminous maintenance rate, therefore, it does not apply to small diameter compact fluorescent lamps.
In 1974, the Netherlands company first successfully developed will be able to issue the human eye sensitive red, green and blue three-color phosphor yttrium oxide (red light, the peak wavelength of 611nm), magnesium aluminate (green, peak wavelength (The name is rare earth eliment trichromatic phosphor), its high luminous efficiency (the average luminous efficiency of 80lm (average luminous efficiency of 80lm) and magnesium aluminate barium (blue, the peak wavelength of 450nm) according to a certain proportion of mixed trichromatic phosphors / W or more, about 5 times the incandescent lamp), color temperature of 2500K-6500K, color rendering index of 85 or so, with it as a fluorescent material can greatly save energy, which is the source of energy efficient fluorescent lamps. It can be said that the development and application of rare earth trichromatic phosphors is an important milestone in the development of fluorescent lamps. No three primary colors phosphor, it is impossible to have a new generation of small diameter compact fluorescent energy efficient fluorescent today. However, rare earth trichromatic phosphors have their shortcomings, the biggest drawback is that expensive.