China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

High pressure sodium lamp is a very high luminous efficiency light source and its efficiency can be up to 100 LM / W, sodium lamp is divided into two kinds of high pressure and low pressure sodium lamp.

In the glass enclosure is made of a special glass discharge tube, the tube is filled with proper amount of sodium, mercury and an inert gas, between the discharge tube and the glass shell vacuum, in order to reduce the influence of environmental temperature on the low pressure sodium lamp radiate from a soft yellow light, it consists of DC and AC two a, the luminous rate of more than 10 times higher than incandescent lamp, can penetrate the smoke, smoke is suitable for use as lighting in more places, but also do polarimeter, Polarimeter, monochromatic light refraction optical instruments such as today in the lamp tube, discharge the general business growth and narrow U shape, the tube temperature should be kept at 270 degrees, the sodium vapor is 5Torr, so the use of a coated with infrared reflective film coat. And is pumped into a vacuum, to reduce the discharge tube of sodium loss below 98 degrees is solid, its vapor pressure is very low, is not easy to make discharge arc, to make the lamp starting voltage reduction, in a discharge tube filled with neon, and mixed with less than 1% argon, although argon micro, but can make the lamp starting voltage reduce 50% because at high temperature sodium vapor chemical reflection ability strong, corrosion most kinds of glass. So the glass wall of the discharge tube is covered with a layer of sodium glass layer. Moreover discharge tube can also use and sodium can not afford to reflect the resistant high-temperature translucent alumina ceramic or transparent corundum made the basic structure of high pressure sodium lamp, mainly composed of filaments, bimetal thermal relay, discharge tube, glass shell, consisting, put appliances made of translucent polycrystalline oxide ceramic, filled with mercury and mercury sodium agent, can produce very high pressure mercury vapor, the filament A wire made of spiral or woven into the shape of a certain amount of alkaline earth metal oxides can be stored. When the heating filament, alkaline earth metal oxide emission of electrons.

The role of double metal is: when the lamp is connected to a power source, current through the high pressure sodium ballast, thermal resistance, double metal tablets to form passageway, thermal resistance heating, double metal pieces are disconnected, instant self induction electromotive force generated by the ballast to inner tube of inert gas ionization discharge, temperature, Mercury also with gasification discharge and the sodium become gaseous discharge to produce light. Because the light source of high pressure sodium lamp close to monochrome, color is not easy, so it is suitable for the color too Important place, but due to its high luminous efficiency, about 2 times the high pressure mercury lamp, life expectancy up to 1000 hours, Once again lit in a minute, both power and ability to penetrate the fog, and therefore, it is widely used in the square, station, airport, highway and so on.The xenon lamp is a mixture of inert gases, which is filled with xenon, including xenon, and no halogen lamps (halogen Filament lamp with high pressure gas discharge lamp (HID xenon lamp, called for heavy metals or xenon lamp, the luminous principle is through the starter and electronic ballast, between the two electrodes formed arc and glow. General English abbreviation Xenon Lamps HID, lighting for cold light source;Mercury lamp with mercury as basic elements, and filled with appropriate amount of other metals (such as CD, Zn) or other compounds of arc discharge lamp metal halide lamp AC power supply of and in mercury and a rare metal halide vapor mixture produced arc discharge glow discharge lamp, metal halide lamp is adding various metal halide made the third generation light source on the basis of a high-pressure mercury lamp. General English abbreviation Lamps HID, lighting for the warm light.

We can clear see xenon lamps, mercury lamps, the difference between one of the metal halide lamp is xenon lamp arc tube is filled with xenon xenon and mercury lamp and metal halide lamps are generally no xenon prices generally more expensive. So xenon lamp price general ratio of metal halide lamp and mercury lamp is high in addition to many, xenon lamp can open that is light, not only cold start can also be hot start. So it can be used as a car headlights, however, the start of a xenon lamp requires a high pulse voltage, usually required for 12000V. So xenon lamp ballast prices generally more expensive for metal halide lamps, mercury lamps, only cold start and hot cannot start. That is to say, if you put light metal halide lamp or lamp extinguished, must wait for 5-10 minutes, can again the difference between light mercury lamp and metal halide lamp. The difference between the two is a metal halide lamp and mercury lamp no pills.