The difference between tungsten halogen lamps and metal halide lamps used in mobile lighting vehicles

The difference between tungsten halogen lamps and metal halide lamps used in mobile lighting vehicles In the process of selling mobile lighting vehicles for so many years, I still encountered many customers who have not yet figured out the difference between tungsten halogen lamps and metal halide lamps. In fact, these two kinds of light sources are easy to distinguish. Tungsten halogen lamps usually refer to the type of incandescent lamps. However, compared with incandescent lamps, tungsten halogen lamps have great advantages. They are relatively energy-saving and smaller than incandescent lamps. , The brightness should be bright. Tungsten halogen lamps Tungsten lamps filled with halogen elements or halides such as bromine and iodine are called halogen lamps or halogen lamps. It is a new generation of incandescent lamps. In order to improve the luminous efficiency of the incandescent lamp, the temperature of the tungsten wire must be increased, but correspondingly, the evaporation of tungsten will cause the glass bulb to turn black. Fill the incandescent lamp with halogen elements or halides, and use the principle of tungsten halogen cycle to eliminate the blackening of the bulb of the incandescent lamp. This is the origin of the halogen lamp. However, in order to ensure the normal progress of the halogen tungsten cycle, the size of the glass bulb must be greatly reduced to increase the temperature of the glass bulb (generally, the bulb temperature of the iodine tungsten lamp is -℃, and the bulb temperature of the bromine tungsten lamp is -℃) to make the lamp The internal tungsten halide is in a gaseous state. Therefore, the glass bulb of the halogen lamp must use quartz glass with high temperature resistance and high mechanical strength. Its structure has double-ended straight tube shape, single-ended cylindrical shape and reflective shape. Because of the use of quartz glass as the glass bulb, halogen lamps are often called quartz lamps. Among them, the reflective halogen lamp is often called a cup lamp because it has a reflector cup. The power of tungsten halogen lamp has W, W, W, W, W, W, W, W, W, W, W, W, W, W, W, W and so on. There are many operating voltages such as V, V, V, V, V and V. The lamp holder has screw type (E, E, E, etc.), plug-in type (GU., GX., GY., GZ and G, etc.) and direct lead-out type. Among them, the cup lamp has a front cover and no front cover. There are several kinds of cup diameters such as mm (MR), mm (MR) and mm (MR). There are many reflection angles such as °, °, °, °, °, °, °, °, and °.　　Because the evaporation of tungsten in the halogen lamp is effectively suppressed, and the tungsten halogen cycle eliminates the blackening of the glass bulb, the temperature of the halogen lamp filament can be greatly increased (up to ℃), so that the luminous efficiency of the halogen lamp is much higher than that of ordinary incandescent lamps. For example, incandescent lamps need to consume W electric energy to reach the luminous flux of lumens, while halogen lamps only need W. The halogen lamp is particularly attractive because of its small size and various specifications. Especially the cup lamp can reflect light concentratedly. Compared with the scattered light source, it consumes the same electric power and can obtain much stronger illuminance. Therefore, People feel that the halogen lamp is “extraordinarily bright”, which can make the surface of the object more brilliant and dazzling, and even feel that it has a charming flashing effect. The reflection angle of the cup lamp can be selected from narrow to wide angles (the narrower the brighter it is), it also provides a lot of creative space for professional lighting design. The halogen lamp has the characteristics of small size, high luminous efficiency (up to-lm/W), stable color temperature (KK can be selected), low light attenuation (less than %), and long life (up to hours to hours). These characteristics show it There is a trend to replace ordinary incandescent lamps. But quartz glass is expensive, and the price of halogen lamps is of course higher than that of incandescent lamps. Like incandescent lamps, tungsten halogen lamps can also be divided into many categories according to use, structure and appearance. The metal halide lamp is what we call the metal halide lamp. The metal halide lamp mainly relies on the metal halide as the luminescent material, and the metal halide is stored in the lamp in a solid form. Therefore, the lamp must be filled with a small amount of igniting gas hydrogen or xenon in order to ignite the bulb. After the lamp is ignited, it first works in a low-pressure arc discharge state. At this time, the voltage of the lamp's two poles is very low, about ~V, and the light output is also very small. At this time, heat is mainly generated to heat the entire lamp body and introduce the metal halide in the lamp. As the temperature rises, it continuously evaporates and becomes a metal halide vapor. Under the action of thermal convection, it continuously flows to the center of the arc. Part of the metal halide is decomposed by the arc ~ K at high temperature and becomes metal atoms and halogen atoms. Under the action of an electric field, The metal atoms are excited to emit light; the other part of the metal halides are not decomposed by the high temperature of the arc, and under the dual action of high temperature and electric field, they are directly excited to form molecular light. Both light sources of mobile lighting vehicles can be configured, but there is a certain price gap. Like conventional field work, it is better to use halogen tungsten lamps, but in terms of brightness, metal halide lamps are better, so customers You can choose different configurations according to your needs.