LED solar outdoor lighting applications: consider the factor of design and application examples

In the past ten years, we see renewable energy technology and practice is gradually entering our daily life. It is part of our society, provides subtle differences for cars, thermostats, lighting control and even daily life. On a larger scale, we see geothermal heat for large buildings, rainwater collection and recycling, not even connected with the power grid solar LED lighting. In fact, the efficiency of LED brings new life to solar energy. Here, we will introduce the benefits and challenges.

Solar outdoor lighting has from other technology talent shows itself not only provide the necessary lighting, for our daily life, also remind users of the facility and by other people consider sustainability in facilities design. Solar outdoor lighting lamp can illuminate in the "communication", pass the relevant environmental management information to the related companies and organizations, builders, developers and lighting designers, these are good.

The solar panel, battery and LED technology, commercial solar outdoor lighting now than grid system is more reliable, and provide high quality lighting at lower cost. In fact, the synergistic effect of technical innovation cost benefit from solar outdoor lighting in three key areas:

- solar panels cost: American Solar Energy Industries Association (SEIA) pointed out that in recent years, the sharp decline in the cost of photovoltaic panels, since the beginning of 2011 has dropped by 60%.

- improved battery technology, hybrid and electric vehicle market growth improved battery technology, the rechargeable battery has the advantages of compact structure, high efficiency, more durable.

LED - efficiency: LED lighting efficiency is also improved, which means less power can produce more light, or higher efficiency (higher lumens per watt), which is equivalent to the output of the same cost reduced lighting.

Due to the emergence of these trends now, commercial solar outdoor lighting in many cases more than grid economy. Including the existing electricity infrastructure in remote or non-existent, such as the surrounding security and green building, or do not want to change the existing landscape (such as roads or roads, parking lot, outdoor storage area, park and campus). In these cases, the installation of solar LED lighting system can be realized immediately, can avoid the installation of new lighting grid system related trenching, wiring and other expenses. In addition, the use of solar LED lights, in the life period of more than 25 years, there will be no electricity bills, the cost can be saved in the coming decades.

However, for the selection of solar LED lighting many companies and organizations, the cost savings are often ranked in second place, with the advantage of green energy. Due to the commercial solar outdoor lamp without the use of fossil fuels, does not produce carbon dioxide emissions, so they can to protect the environment and national energy security commitments.

Many companies and organizations use commercial solar outdoor lighting to achieve the sustainable development of infrastructure "(ISI) target sustainability assessment system to determine the. Solar LED lamp can also be used to meet the goal of sustainable development of a building, to meet the "corporate social responsibility" (CSR), or to obtain the integral U.S. Green Building Council plan LEED. The solar LED lighting, small ads each of which become the responsibility of environmental protection, which is the traditional marketing tools can not be achieved, because it is in the action rather than words to express commitment.

The design of a sustainable system

Although in consideration of commercial solar outdoor lighting system needs to solve the technical problem, but the system design has three aspects:

- how much light? - how much solar energy can be collected? What time need lighting?

On the first question, many companies, organizations and government were surprised by the high throughput LED provided in the solar outdoor lighting applications clear, high quality light. In addition, the new LED technology can enhance control, greatly reduce the overflow and glare, and provide more effective lighting distribution. For example, the traditional high pressure sodium (HPS) lamp or metal halide lamps (MH) formed under the lamp light pattern, while LED can be in a pattern of projected light wider and more uniform, can produce optical flow along the road of uninterrupted, and the maximum allowable distance, this reduces the cost.

About how much solar energy ", the amount of solar energy on" equivalent sunshine "to measure. The largest solar panel received an hour (or 100%) the sun is equal to a full day. Although the sun may exceed the horizon 14 hours a day in a particular position, but because of the angle of sunlight in the atmosphere and the loss of the number of full sunlight can be as little as six hours a day. In order to enable the system to achieve the desired performance, design according to the needs of the least sunshine time available. For this reason, solar LED lights are usually designed for each specific project. However, due to the commercial solar outdoor lighting usually have enough battery power to supply at least five of the night light, so the solar lighting system can effectively operate in all sunlight environment.

The last question is the definition of how to control the lighting system. Unlike traditional commercial outdoor lighting, LED provides more flexibility in the control. In addition to set the on / off time, LED also allows dimming, and when no one is present, the use of motion sensors to turn off lights (or light from light to dark).

These factors will affect the solar panel, battery, lamp