Light bulbs almost can be seen at everywhere in our daily life. The structure of a light bulb is very simple. In the bottom of it there are two metal contact points, which are used to connect power. There are two lines of the metal contact points that contact with a thin metal filament line. The metal filament is located in the center of the bulb supported by a glass pole. Lines and the filament are wrapped in a glass bulb filled with inert gas inside. When the light bulb connected to the power, the electronic current will be from one of the contact point to the other contact, and then flow to the line and the filament.Most wear and tear of light bulbs is caused by thermal expansion and contraction of the light bulb filament in the process of repeatedly switching. As time passed, the incandescent light bulb will gradually evaporate and produce a number of smoke dust, then reduce the filament function and lessen the brightness.
The relationship between the brightness of incandescent light and the use time is very complex In simple words, the brightness depends on voltage, production quality and the frequency of light switch. If the voltage is reduced by 5%, then the lifespan of a light bulb will increase more than 2 times, but the brightness will be reduced by 20%. Therefore, people can select the appropriate combination of voltage and brightness according to their needs. For example, the floodlight used in theater can increase the brightness according needs, while it will shorten the life.
A fatal weakness of incandescent lamp is that its 90% of the power consumption is as heat form rather than light form. The power efficiency of incandescent lamp is only 2%. Therefore, now the world is largely encourging the use of energy-saving lamps and LED lights. The efficiency of LED lights is more than 10%, and the lifespan of which is generally from 5 to 25 years. There are much more China manufacturers for LED light products.
Resource:
www.ecvv.com is an innovative and comprehensive business portal in China, dedicated to saving costs for Chinese SMEs to find buyers and export to overseas markets.
<a href="http://www.ecvv.com">www.ecvv.com</a> is an innovative and comprehensive business portal in China,
dedicated to saving costs for Chinese SMEs to find buyers and export to overseas markets.
没有评论:
发表评论