Halogen bulb and other incandescent lamp is the biggest difference is that the halogen lamp glass shell filled with some halogen element gas (usually iodine or bromine), its working principle: when the filament fever, the tungsten atoms are evaporated to the As the glass tube wall moves, the tungsten vapor is cooled to about 800 ° C and is combined with the halogen atom to form tungsten halide (tungsten iodide or tungsten bromide) when approaching the glass tube wall. 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 is re-decomposed into halogen vapor and tungsten after heat, On the deposition down, make up the part that has been evaporated. Through this regeneration cycle, the service life of the filament is not only greatly extended (almost four times that of incandescent), but also because the filament can work at higher temperatures, resulting in higher brightness, higher color temperature Higher luminous efficiency.
Halogen lamps are made of tungsten filament, but are wrapped in a smaller quartz glass. Because the glass from the filament is very close, if it is made of glass it will be easy to melt. The gas in the bulb consists of different groups of halogen lamps. These gases have a very interesting feature: they are combined with tungsten vapor. If the temperature is not high enough, the halogen gas combines the tungsten atoms to evaporate and re-deposited on the filament. This cycle of the process, so that the filament continued a lot of time. In addition, it can run hot filament, which means you get more light energy. You still get a lot of heat, but because the quartz glass is so close to the filament, it is hotter than a normal light bulb.
Halogen bulbs can also operate at higher temperatures than conventional incandescent lamps, and their brightness and efficiency are higher. However, at this temperature, ordinary glass may soften, so halogen bulbs need to use a higher melting point of quartz glass. And because the quartz glass can not block the UV, so the halogen bulbs are usually and need to use another UV filter.
Halogen bulb on the crystal glass if there is oil, will cause the glass on the different temperature, reduce the lamp life. So when you change the halogen bulb to avoid touching the glass bulb. If the fingers touch should be alcohol clean.
(1). When installing the halogen bulb, turn off the power and use the plastic cover to protect the bulb glass shell. Do not touch it with your hand. If you touch it, touch it with alcohol.
(2) Halogen bulbs made of high temperature resistant quartz glass, such as stained hands or oil, will make quartz glass luster, become white turbidity and reduce brightness, shorten life, and even glass shell rupture.
(3). Halogen bulb lighting, the sealing of the temperature can not exceed 350 degrees, otherwise it will shorten the life of halogen bulbs, so halogen ventilation and ventilation must be good.
(4). Halogen bulb When lighting, avoid direct air blowing to the bulb.
(5). Halogen bulb lighting, to avoid the impact or vibration.
(6). Halogen bulb or just turn off the lights, the bulb temperature is still high, absolutely can not touch the hand.
(7). Halogen lamps should not be frequent on / off, otherwise it will significantly shorten its life. The reason is: compared with normal work, in the light of the moment, the lamp tungsten wire temperature is very low, so the resistance is very small, in the same voltage, the current than the normal working current much larger, so Tungsten atoms evaporate faster; at the same time because the bulb gas temperature is relatively low, so the decomposition rate of tungsten halide slower, so back to the tungsten wire tungsten atoms much less than normal work. So the moment in the light, the tungsten wire consumption is the largest, so frequent on / off will significantly shorten the filament life.