LED really saving it?

 Prior to this, the lighting industry has never been so beautiful before. Needless to say the industry in energy conservation and environmental protection of the environment and the trend , LED light source has become the mainstream of the future of lighting is an industry consensus , the general trend. Talk of the town even in the consumer market , when it comes to lighting, although most scanty , they are known to everybody LED, which is naturally half thanks to the Government's strong support for the promotion of power, but also the other half of the advantages of LED technology itself and charm due.
The eyes of the general public , as a new lighting technology , LED has basically been equate with saving , the only obstacle seems to be the price . And even in the country , the price is not the problem ( the reason we know everything ) . However , LED energy-saving lamps really do ?

1 , light source efficiency

LED (Light Emitting Diode) is a light-emitting diode, is a computer into visible light can solid-state semiconductor components , like a traditional incandescent and halogen light-emitting principle behind thermal radiation , fluorescent lamps , mercury lamps, sodium lamps and gold halogen lamp is used as the gas discharge principle , LED itself is also a technical representative , a light emitting principle .

Luminous Efficacy : luminous energy into visible light ability , with the ratio of luminous flux and power measured in units of lm / w.

As can be seen from the table , LED technology as a new light source, than traditional lighting technologies have a certain nature . We often speak of LED energy saving is also on this level of judgment , in fact, to determine whether an energy-saving lamps far beyond what technology and light. But even so , the luminous efficiency of a wide range of LED technology , the general said LED light source is also more energy efficient than other light sources is not accurate , it is like saying people are romantic, Chinese people are industrious, the Japanese have behaved the same, do not science. We get along , I have to see each other is how a specific French, Chinese and Japanese , but also with LED products as well.

2, electrical energy efficiency

In addition to the line voltage incandescent and halogen lamps , light sources are needed with other lighting appliances . Electrical lighting power utilization is also problematic , namely the use of electrical energy from the power line drive in the ratio of light source used in the case without considering harmonics , power factor λ is usually cosφ to represent. These do not understand it does not matter , in short , the efficiency of lighting appliances usually need to see the power factor indicators on the right.

Most brands will provide electrical products like books or on the efficiency of the system parameters of a single page , as shown below, our designers can require manufacturers to provide relevant parameters.

3 , lighting efficiency

Lighting efficiency is better understood, simple terms is the ratio of the light fixtures inside out under standard conditions of light out of the light , usually expressed LOR , LOR = luminous flux emitted by the lamp / luminaire light flux. For example, a normal 3 * 14W lamp panel , a light source is the total luminous flux 3600lm, if the measured lamp luminous flux is out of 1800lm, we say that the lamp efficiency is 50%.

4 , energy-efficient lighting

If lamps with light and practical method and location are similar , the evaluation is not an energy-efficient lighting , requires a combination of these three aspects of energy efficiency lamps come :

Lighting Energy Efficiency = Luminous flux emitted by the lamp / ( Loss source of electrical power + ) = light emitted * LOR / ( + electrical source power loss )

For chestnut : If a 3 * 14W Lamp A, total luminous light source is 3600lm, lighting efficiency is 65% , the whole lamp power is the source power 42W (3 * 14W) plus electrical losses 10W, then it is energy-efficient lighting 45lm / W.

5, LED lamps are energy-efficient ?

After clarifying the evaluation of whether or not the standard of a saving lamps, mutatis mutandis, to find the right thing as long as we can judge the merits of these two fixtures .

Taking a brand 3 * 14W Grille with , for example, when it uses three lamps 14W/1200lm , and with a single tube 14W ballast and one pair of tube 2 * 14W ballast , the system power is 18 +32.5 = 50.5W. Grille efficiency LOR = 75%, then the lighting system efficiency is 3600 * 75% / 50.5W = 53.47lm / W.

At this point, as long as the corresponding type LED lamps to replace energy-efficient lamps 3 * 14W higher than 53.47lm / W, we can say that it is energy-efficient.

Summary: When we designed the "choose Light" link, select the appropriate light source is mainly supporting the right appliances, as well as proper lighting , energy efficiency is one aspect to consider .

When considering the energy efficiency of our design, we can not just use any type of technology and light , but also the actual parameters lighting, electrical and lighting , it is best able to sample and measure the physical examination .

From this we can see that now popular to say how much money one watt LED is actually very not justified, because the owners purchase lamps to buy is "light" instead of " power " ; using yuan / watt to measure LED, likely to buy low light efficiency is not energy-efficient LED products in the lighting level to consider the correct measure of economic indicators should be RMB / thousand lumens, behind us again in detail.

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