Three hours a day eight hours a day

A few days ago, a TV station's lighting division said that there are now many kinds of LED lights on the market that are more energy-efficient than energy-saving lamps. He is planning to replace the mother's downlight with an LED spotlight.

"Even if the LED lights are on for 24 hours, they will only need to pay for electricity for a month, so that the elderly will be safer at night."

In addition, in the next five years, Hangzhou LED output value can reach 20 billion yuan, has been listed as one of the ten strategic emerging industries in Hangzhou.

What is this LED light in the end? Really power-saving? Is it cost-effective to replace energy-saving lamps with LED lights?

Turn on the light for 10 hours a day

LED lamp can use 13 years

The full name of the LED is Light Emitting Diode, a semiconductor light-emitting diode that can directly convert electrical energy into visible light, which is more efficient than energy-saving lamps. Therefore, it is more energy-efficient and environmentally friendly.

The LDE lamp had been in existence since the 1960s. The earliest red light came out, and later it had a green light. It was mainly used in dashboards and decorations. Now widely used in mobile phones, computers and cars.

"At the beginning of the 90's, foreign countries developed high-brightness LED blue light, so that LED has been able to mix with other colors of the three primary colors - red, green, blue, into the home lighting becomes possible." Huang Jingyun, professor of materials from Zhejiang University said.

Brightness, 1 watt LED lamp brightness equivalent to 2 watts of energy-saving lamps, and 90% of the electrical energy into visible light, less heat;

Compared to energy-saving, 5-watt LED lamp consumes 5 hours in 1000 hours, and the lighting brightness is equal, 10-watt energy-saving lamp consumes 10 hours in 1000 hours;

Compared with the life span, the service life of the energy-saving lamp is 8000 hours. The LED lamp can reach 50,000 hours - equivalent to 10 hours a day. It can be used for 13 years. The LED lamp has no filament and you do not need to worry about breaking the bulb.

Compared with environmental protection, ordinary lamps, including energy-saving lamps, contain mercury. The mercury contained in dozens of bulbs can contaminate the entire West Lake, and LED lamps do not.

More than health, energy-saving lamps emit ultraviolet and infrared rays when they are glowing, and LED lamps do not radiate.

LED lights are still few domestic varieties

It is not worth using now

There are many advantages of LED lights, but it is still difficult for buyers to use LED lights in the market. Home LED lights are mostly used as spotlights and decorative spotlights and light strips, while the main lights and table lamps have not been bought at all.

"A trip home LED lights in three or four hundred dollars or so, a few hours a day, it is not worthwhile to count." Hangzhou Jingli Lighting Electric Company CEO Sun Jian, is a well-known lighting company in Germany Osram's agents. He said that the current LED core technology in the hands of five international lighting giants such as Germany Osram, Philips of the Netherlands, LED light manufacturing standards to be developed by them, but has not been introduced. "No standards, the market is certainly chaotic. 1 watt LED lights, high-end product prices should be around 100, but now from 20 to 100 have, many LED lights are low-end products produced in China."

Sun Jian said that most LED lights are currently used in shopping malls, office buildings, hotels, factories, and high-end properties; the other is museums and art galleries because LED lights do not damage the collection.

Zhejiang Jilaitai Optoelectronics Technology Co., Ltd. is a local manufacturer of LED lamps in Hangzhou. Manager Hong Wei does not recommend using LED lights in the home. “Actually, various kinds of LED lights for home use can now be produced, and production is not mainly a price issue. If you don't use it for a long time or in large quantities, it is not worthwhile to replace the LED lights in home lighting. This is also the reason why there are very few household LED lights in the market."

Currently on the market more common home LED spotlights, 2 watts brightness equivalent to 20 watts of ordinary spotlights, the following is a comparison account:

2 Watt High Quality LED Spotlight 20 Watt Ordinary Spot Light

The price of 200 yuan is about 20 yuan

Lighting time 8 hours/day 8 hours/day

Peak price about 0.6 yuan / degree about 0.6 yuan / degree

Annual electricity costs about 3.5 yuan for about 35 yuan

The total cost of 203.5 yuan 55 yuan

"If for the safety of the elderly, you can replace the LED lights in the toilets as long-term lights, it is best not to tell them the price of this light." Sun Jian said.