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

Metal halide lamp has a large range of: E39/E40 high power for from 35W ~ 400W, lamp holder is Edison screw type (below 150W is E26/E27), the arc tube installed in the oval or hard tubular glass shell this series specifications of metal halide lamps to the office, supermarket, large warehouses and other indoor lighting is offering new options. In these places, they can improve the original lighting color and light levels, the lighting effects from the quality and quantity are more than the traditional high pressure mercury lamp, fluorescent lamps and incandescent lamps. Metal halide lamps for general lighting are smaller than those for special purpose metal halide lamps, so the service life is longer and can reach 12000---20000 hours. Need to explain is that the concept of lamp life is still pending. Some manufacturing plants use the concept of "life", which considers the decline of lamps and lamps. And other manufacturing factory is defined "life" for the next batch test lamps in a 50% survival time (in some cases, it can also and lumen recession or color properties).

Consider and compare the factory claimed the lamp of life value, we should first make clear manufacturing plant in the catalogue in the definition of technical parameters like high pressure mercury lamp that through fluorescent powder conversion parts purple outside radiation to visible light is possible. However, the absorption of the phosphor layer has not increased the light effect. Usually the use of fluorescent powder in order to improve the color rather than improve the efficiency of light, designed to obtain the maximum luminous efficiency of lamp usually transparent blister generally speaking, in order to prevent the metal halide lamp may occur at the end of life burst, ordinary metal halide lamps should only be used in the design of the lamps and lanterns of hot particles safety door in. As an exception, metal halide lamps are gradually applied in the family lighting. The special design of the metal halide lamp can still keep the integrity of the outer bubble in the case of the arc tube bursting. This type of metal halide lamp is usually made of one or two layers of thick sheath around the arc tube, and it can be used to identify whether they are suitable for the use of metal halide lamps in the open lamp.

Note that the assembly structure separation type frame used in sodium -- scandium lamps. This structure is conducive to reduce the optical power supply. The electrical erosion of the arc tube wall will cause the loss of sodium, and eventually lead to the damage of the arc tube. Trigger circuit of thermal switch, is used to eliminate the starter and the main electrode potential difference between the, in order to reach similar purposes in commercial lamp has three main filler system: -- Sodium scandium, sodium - indium, and rare earth elements (usually in dysprosium based, then add such as thallium, Ho, CS and TM) sodium -- SC system has the highest light effect. However, this is at the expense of the display color index (lamp even using fluorescent powder coating, the color values are not higher than 70) and lumen to maintain characteristics (sodium -- SC system than the system difference) the cost of some manufacturers through in sodium -- scandium lamps using a special arc tube to enable the light efficiency reaches the maximum value. This type of lamp is designed for a particular position (horizontal or vertical). The special shaped arc tube used in these lamps can be used to keep the distance between the arc and the tube wall, so as to improve the uniformity of the temperature and improve the performance of the lamp. The metal halide lamp on rotary positioning have further restrictions, and the application of special lamp or lampholders, in order to provide the correct historical azimuth, lamp factory independently developed developed lighting only under the approval for the factory of production of ballast to work. These may be based on the existing high pressure mercury ballast for high pressure sodium lamp. In Europe, the most commonly used is the ballast and trigger system, while in the United States, CWA (constant power self coupling type ballast) device is more commonly used.