Is an LED lamp with only 10 degrees of electricity a year really an energy-saving savior?
With the implementation of the ladder price policy, the savvy Wuxi citizens have paid more attention to energy conservation. Now even buying a light bulb has to be calculated.
Xiao Xu, a citizen, purchased a new house decoration at a Decoration Group purchase station. Under the encouragement of the shopping guide, he bought a lot of LED lamps.
Although LED is more expensive, there is nothing to say about energy saving. The shopping guide told me that LED can save of electricity than traditional energy-saving lamps.
Yesterday, the reporter came to the mechanical and electrical products testing center of Wuxi Inspection and Quarantine Bureau and consulted relevant technicians on this fashionable LED lamp to understand its magic.
Compared with incandescent lamps with the same brightness, 70 yuan's electricity bill Guide said that the electricity saving 70 is indeed quite economical compared with LED lamps and fluorescent lamps with the same brightness.
Zhao Jiejun, deputy director of the testing center, calculated an account for the reporter: a 3w LED lamp with a brightness equivalent to a 40w incandescent lamp is used for 10 hours a day, and the electricity consumption in a year is only 10 degrees, the incandescent lamp needs 146 degrees, and the electricity saving is about 70 yuan.
Another prominent feature of LED is its long life. The life of ordinary incandescent lamp is 1000-
2000 hours, the life of ordinary fluorescent lamps is 8000 hours. The life of LED lamp is 3-50 thousand hours, such as press 3.
20 thousand hours calculation, the life of an LED lamp is 4 times that of an energy-saving lamp, that is, the energy-saving lamp is replaced four times, and the LED lamp is replaced only once.
LED lamp has other features, such as its strong voltage adaptability, from tens of volts to 264 volts can work normally.
Moreover, the influence of instantaneous current on them is not serious.
Energy-saving bulbs are broken in some people in less than two months. The fluorescent tubes are red and black at both ends, mainly because they are often switched on and off.
The instantaneous current generated when the lamp is switched on and off is fatal to the life of the energy-saving lamp. Many energy-saving lamps have not started to save energy for the main family, and they have died before they start. This problem is not on the LED.
According to the reporter's understanding, the LED lamp home market in Japan, South Korea and Taiwan is relatively active.
In Taiwan, the electricity price was raised once in May this year, and the energy-saving benefits of LED lights began to show. LED lights were sold in local small convenience stores, and the business was very hot.
It is recommended not to use LED desk lamps for children, but things always have two sides. The high price of LED lights is an indisputable fact.
Recently, the reporter visited some big supermarkets in Xicheng and found that the general LED lights are about 50 yuan.
If an 8w LED lamp is waterproof and certified, the price can be as high as hundreds of yuan.
When the reporter searched on Taobao, he found that the price of many so-called high-quality LED spotlights was only a dozen or twenty yuan.
Relevant experts explained that LED lights are expensive and complicated to manufacture. The production cost of 1w is about 10 yuan.
Like some brand products, Philips's 3wLED lamp sells for about 60 yuan.
In addition, because the LED lamp has the characteristics of heat accumulation, it must have a good heat dissipation device.
Experts showed several different LED bulbs to the reporter. The reporter found that their lampshades were made of a layer of aluminum shell. These aluminum are used for heat dissipation. We have seen lampshades made of plastic, that kind of LED lamp is definitely not qualified.
Although there are many LED table lamps on the market, some also have a special eye protection concept.
However, the reporter learned in the interview that professionals have different views on whether this kind of lamp is suitable for reading.
The experts interviewed by the reporter said that because the lighting range of the LED lights is relatively concentrated, the farther from the LED lights, the lower the illumination. If it is hoisted to the ceiling, it is difficult to get good illumination in other corners.
In addition, LED lamps may have certain photobiological hazards, so they are not recommended as light sources for reading and writing.
Choose big brand products, ordinary citizens want to choose LED lamps, how to choose?
Experts said that due to the mixed LED market, we still have to choose the brands of well-known large enterprises when choosing. These enterprises have good quality awareness, product safety indicators and product performance indicators can meet the requirements of national standards.
In addition, experts also remind the public to pay attention to a professional term called color temperature.
This color temperature indicator will be marked on the package and many people cannot understand it. Generally speaking, it is the color of the light source.
Specifically, when the color temperature is less than 3300 k, it is warm, suitable for use in the family to create a warm atmosphere.
If it is a factory workshop or office, it is suitable to use 3300-
5300k intermediate color, simulating the effect of sunlight.
If you want to have some special atmosphere, such as darker and colder, the color temperature choice is greater than 5300 k. (Evening News reporter Gao Jing)
LED is English lightemittingdiode (Light emitting diode)
Its basic structure is a solid-state semiconductor device that can convert electrical energy into visible light.
In the 1960s S, science and technology workers developed LED light emitting diodes using the principle of semiconductor PN junction luminescence.
At the beginning, LED was used as the indicator light source of the instrument, and LED emitting white light was successfully developed in 1998.
At present, daily LED is mainly used for building appearance lighting, landscape lighting, sign and indicative lighting, indoor space display lighting, entertainment venues and stage lighting, etc.
Although the traditional light source cannot be completely replaced at present, with the continuous improvement of technology, it must be LED in the future.
In early 2007, the Australian government took the lead in announcing the complete elimination of incandescent lamps in the form of legislation.
China has also announced that it will phase out ordinary lighting incandescent lamps in five stages. It will ban the import and sale of ordinary lighting incandescent lamps above 100 watts from October 1 this year, and then transition to 60 watts and 15 watts.