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High pressure sodium lamp is usually a very large luminous efficiency from the new power supply and its efficiency is usually as much as 100 LM / W, high pressure sodium lamp is divided into two varieties of substantial stress and lower pressure high pressure sodium lamp. A discharge tube made of a special glass is manufactured from a particular glass while in the glass situation, as well as the tube is full of an suitable level of sodium, mercury drop and inert gasoline, the discharge tube as well as the glass shell are pumped into a vacuum to reduce the influence on the ambient temperature on the lamp. Minimal strain high pressure sodium lamp amplitude injection soft yellow light, it may be divided into two kinds of DC and AC, the luminous efficiency than incandescent lamp higher a lot more than ten instances, can penetrate by the smoke, appropriate as lighting in spot to smoke additional, also can do polarimeter, Polarimeter, refraction these days optical instruments such as monochromatic light supply, the lamp discharge tube standard business enterprise growth and narrow the U shape, the temperature to remain at around 270 degrees, sodium vapour 5 Torr, so working with a coated with infrared reflective movie coat. And vacuum, in an effort to reduce the discharge reduction. Sodium below 98 degrees is sound, its vapor strain is incredibly minimal, isn't quick to create discharge arc, so that you can make the lamp beginning voltage reduction, within a discharge tube full of neon, and mixed with much less than 1% argon, even though argon micro, but can make the lamp commencing voltage decreased by about 50%. As a result of large temperature on the chemical reaction of sodium vapor is quite sturdy, might be corrosive to most sorts of glass. So the glass wall of the discharge tube is covered by using a layer of sodium glass layer.

In addition the discharge tube can also be used with large temperature sodium will not reflect the translucent or transparent alumina ceramics made from corundum. The essential framework of high strain high pressure sodium lamp, primarily composed of filaments, bimetal thermal relay, discharge tube, glass shell, composition, put appliances made from translucent polycrystalline alumina ceramic, filled with mercury and mercury sodium agent, can develop very large pressure mercury vapor, filament by a tungsten filament manufactured spiral or woven into the form of the selected level of alkaline earth metal oxides can be stored, once the heating filament, alkaline earth metal oxide emission of electrons.

Double metal part is: once the lamp energy, the present by means of the ballast, thermal resistance, double sheet metal forming pathway, thermal resistance heating, double metal pieces, instantaneous electromotive force produced from the HPS ballast that inert fuel ionization discharge tube, temperature, mercury with gasification discharge, the sodium come to be gaseous discharge resulting from light source, for the reason that of large pressure high pressure sodium lamp close to monochrome, colour just isn't easy, so it can be ideal for your color isn't as well critical, but because of its higher efficiency, about two instances as large pressure mercury lamp, extended lifestyle of 1000 hrs, can ignite, not simply energy once more in 1 inside minutes, through fog and sturdy means, so it really is broadly used square, station, airport, highway and so forth.