日期：2012年7月19日

The Climate Group called on countries to accelerate towards low carbon commercial led lighting

In the recently concluded United Nations Conference on Sustainable Development, the Climate Group released an independent global technical test results, LED lights can save up to 85% of energy. The trial also found that the pilot of urban residents prefer LED lighting and believe that its social and environmental benefits. CEO MarkKenber of the Climate Group, said: “This report clearly shows that LED technology has been with the conditions of a wide range of applications in various towns around the world, we call on governments to remove policy barriers and accelerate the transition to a low carbon commercial led lighting.

The Climate Group called on countries to accelerate towards low carbon commercial led lighting

This independent test of the LED lighting project for a period of two and a half years, 15 tests were carried out in 12 cities around the world in New York, London, Calcutta, Sydney and Hong Kong. The test conclusions by “light clean revolution” the rise of the LED road lighting and led street lights its significance for the city’s report was first released.

The report analyzes the status of the global lighting market, as well as the prospects for the development of LED technology. For those seeking to upgrade and for large-scale LED retrofit projects for financing policy makers and urban commercial led lighting managers, the reports provide a detailed reference.

The concept of “clean revolution” movement advocated by the Rio +20 summit as where part of the Philips report by The Climate Group join hands together to complete, which is to practice “clean revolution”-a relatively small cost savings in a relatively short time.

According to statistics, 19% of the electricity used for lighting, and 6 percent of global greenhouse gas emissions from the lighting. If you double improved efficiency of the global greenhouse, the influence is equal to reduce half of the energy and electricity and heat production of greenhouse gas emissions. The same with other energy-saving technologies, energy efficient lighting will promote global prosperity. Only in the United States, the field of lighting energy demand, which is equivalent to the generating capacity of 198 medium-sized power stations.

The Climate Groups and Philips called for the establishment and implementation of an international low-carbon commercial led lighting standards, and to ensure that the world has the opportunity to enjoy the energy-efficient outdoor lighting.

stealth led grow light reviews for solar use

With the development and progress of solar photovoltaic technology, solar cells as a new energy, first applied in the civilian aspects of the lighting, solar lighting products due to environmental protection and energy saving dual advantage. The solar LED lighting products is the next generation of green lighting products, and its main components, including solar photovoltaic cells (PV) and semiconductor lighting (LEDs). LED solar lights integrated solar photovoltaic and LED solid state lighting the advantages of solar LED lighting systems to achieve the perfect combination of a new generation of energy and a new light. However, in the design of solar lighting, involving light, solar battery systems, battery charge and discharge control of a number of factors, any part of a problem will result in product defects.

stealth led grow light reviews for solar use

A first look at solar lighting composed of:
The key lies in solar photovoltaic technology and LED lighting (stealth led grow light reviews) a perfect combination of both direct current, low voltage and can be matched. The combination of the two do not need the solar cells produce direct current into alternating current, thus greatly improving the efficiency of the entire lighting system. The same time, by means of network technology or the use of battery charge and discharge energy, to make it more obvious advantages.
1, solar panels
2, the charge and discharge controller
3, the battery
4, the load
5, shell lamps

Second, the design used must be noted: (LED lawn lamps  (stealth led grow light reviews) , for example)

LED characteristics close to the Zener diode, the work of change in voltage 0,1 V, operating current of may change 20mA or so. For security, under ordinary circumstances, using a series current limiting resistor, a great deal of energy loss is clearly not suitable for solar lawn lamp, and LED brightness changes with the operating voltage. The boost circuit is a good way, you can also use a simple constant current circuit, in short, must be automatic current limiting, otherwise will damage the LED lights.

2, the peak current of the general LED 50 100mA, reverse voltage of about 6V, careful not to exceed this limit, especially in the reverse polarity of solar battery or battery no-load, high peak voltage boost circuit is likely to exceed this limit, damage LED (stealth led grow light reviews) .

3, LED temperature characteristic is not good, the temperature rises 5 ° C decreased by 3% luminous flux, summer should pay attention to.

The operating voltage discrete, the same model, same batch of LED street lights operating voltage has some differences, and should not be used in parallel. Must be used in parallel, you should consider are flow.

 

stealth led grow lights and led drivers

LED digital tube display use the drive circuit to drive the digital tube segment, which shows what we want, therefore, according to the different ways on the drive LED digital tube can be divided into static and dynamic categories .

stealth led grow lights and led drivers

A, static display driver:
Static drive, also known as the DC drive. Static drive means to each tube for each segment of code consists of a microcontroller I / O ports to drive, or use, such as BCD code – decimal decoder decoding to drive. The advantages of the static drive is programmed, the display brightness, the drawback is that takes up I / O ports and more, such as driving the 5 digit tube (stealth led grow lights)  static display, 5 × 8 = 40 I / O port to drive, be aware that a 89S51 microcontroller available the I / O port 32. Must be increased so the practical application of the decode drive to drive, increasing the complexity of the hardware circuit.

B, dynamic display driver:
Digital dynamic display interface is one of the most widely used microcontroller, a display, dynamic driving the all digital tube  (stealth led grow lights)  8 shows the stroke “a, b, c, d, e, f, g, dp” with the same name connected together, the other to increase the bit strobe control circuit for each of the tube very COM-bit strobe controlled by a separate I / O lines, when the microcontroller output glyph code, all digital tube received the same font code, but what is the digital tube will display the shape, depending on the control of the microcontroller strobe bit COM terminal circuit, so we just need to display digital tube strobe control open, the bit on the show the glyph, there is no digital strobe tube will not light.

Through time-sharing in turn control the COM side of each LED digital tube, so that in turn controlled display various digital tube, which is dynamically driven. In the rotation display process, per bit digital tube light time of 2ms, the human visual persistence of the phenomenon and the light-emitting diode (stealth led grow lights) afterglow effect, despite the fact that you number the pipe is not lit, but as long as the sweep The aim of speed is fast enough to create the impression that a stable set of display data, there will be no light flashes, the effect of dynamic display and static display is the same, can save a lot of I / O port, and lower power consumption.

Constant current driver with constant current driver on the LED digital tube is mainly the following:

1, showing the effect:
LED tube is basically a current sensitive components, the dispersion of the forward voltage drop large, and also with the temperature, you need to make it a constant current in order to ensure digital pipe has good brightness uniformity, and can not be temperature and other factors. In addition, when the temperature changes when the driver chips also can automatically adjust the size of the output current in order to achieve the temperature compensation of the color balance.
2, security:
Even short-term current overload may also cause permanent damage to the LED lights, digital tube, constant current drive circuit to prevent current fault extensive damage.
In addition, the Commission adopted VLSI characteristics of cascading delay switch to prevent reverse voltage spike damage on the light-emitting diode. VLSI also has thermal protection which automatically shuts down when any one temperature exceeds a certain value, fault indication and can be seen in the control room.