LED Signal Light Luminous Efficiency

With the improvement of lighting technology, metal halide lamp (white light, referred to as halogen lamp, also known as tungsten halogen bulb, halogen quartz lamp, is a variant of incandescent) developed by high pressure mercury lamp, made of high purity quartz tube The quartz tube is filled with iodide, argon, gallium iodide, iron iodide and some rare metal halide. The tungsten electrode is sealed by a molybdenum tape to form a circuit, and the metal lamp cap is used as a tip. Halogen bulb and incandescent lamp is the biggest difference: that is, halogen lamp glass shell filled with some halogen element gas (usually iodine or bromine), LED Signal Light its working principle: when the filament fever, LED Signal Light the tungsten atoms are evaporated to the glass tube The wall is moved, and when approaching the glass tube wall, the tungsten vapor is cooled to about 800 degrees and is combined with the halogen atom to form tungsten halide (tungsten iodide or tungsten bromide). The tungsten halide continues to move toward the center of the glass tube and returns to the oxidized filament. Since the tungsten halide is a very unstable compound, it will re-decompose into halogen vapor and tungsten after heat, The filament's life is not only greatly extended (almost four times the incandescent lamp), but also because the filament can work at higher temperatures, LED Signal Light resulting in more High brightness, higher color temperature and higher luminous efficiency. However, due to the railway signal power supply fluctuations (AC170V-AC250V), the same impact on the halogen lamp life and luminous efficiency.

Conductor LED light-emitting diode lighting technology, is developed in recent years, a new type of green lighting industry. In the 1990s, with the invention of nitride LED, LED luminous efficiency has been a qualitative leap. As a light source, LED advantage is reflected in three aspects: energy saving, environmental protection and long life. LED does not rely on filament fever to light, energy conversion efficiency is very high, LED Signal Light it only needs incandescent 15% - 20% of energy consumption, compared with energy-saving fluorescent lamps only 40% -50% of the energy consumption. In terms of service life, LED solid package, solid structure, life of up to tens of thousands of hours, is the number of 10 times the life of fluorescent lamps and incandescent lamp life nearly a hundred times. And because of the manufacture of fluorescent and incandescent materials containing mercury components, in the production and use of rupture and overflow of mercury to cause secondary pollution of the environment.

(AC130V-265V), DC constant voltage output, the halogen signal bulb work and extend the service life has played a very good role, to solve the previous transformer single power supply, LED Signal Light power supply voltage fluctuations, affecting the use of light bulbs Life and luminous efficiency. For high-power LED railway signal using constant pressure power supply, each LED LED is to take constant current drive, detection and sampling, LED Signal Light so that each LED working status by the detection control circuit monitoring, when 30% LED open or 30% LED short-circuit damage , Lighting unit alarm.