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Light emitting diode (LED light) is a semiconductor light source that is used in indicator lamps of many devices. An LED is often small in size and their radiation pattern is shaped using accessory optical components. In order to use LED for room lighting it could be relatively expensive and accurate current and heat management is required. The size of LED lights, their ability to offer narrow bandwidth and extreme reliability has opened doors for development of new text and video displays and sensors. The design of high power LED lights has replaced the incandescent and fluorescent lighting for LED lights.

What are they made of?

An LED light consists of chip of semiconducting material. The current in these lights flows from anode to cathode as in case of other diodes but not from cathode to anode. The charge carriers namely electrons and holes flow into the junction from electrodes with different voltages. The color of the LED light depends on the band gap energy of the materials forming the p-n junction. The materials that are used in LED lights have energies in the range of near infrared, visible or near UV light. Due to very high refractive indices of the LED, most of the light is reflected back into the material that is used in their making.

There are a variety of LED lights but the major varieties are the miniature, high power devices and custom designs such as alphanumeric or multi-color.

Advantages:

LED lights are very beneficial compared to incandescent light sources as they consume

• Less energy.
• Lower energy consumption.
• Longer lifetime with greater durability and reliability.
• Small in size.

Where are LED lights used?

LED lights are used for aviation lighting, automotive lighting i.e. for brake lamps, turn signals and as well as indicators. Even in traffic signals LED lights are used. Due to their high switching rates they are also being used in advanced communications technology. The remote control units of electronic gadgets such as televisions, DVD players and domestic appliances also use Infrared LED lights.

The initially designed LEDs used to operate with electric power of 30-60 mill watts and large sized semiconductor to handle the power inputs. With the continued research in the functioning of LED’s their size has gone down gradually. Another important factor to be considered is their efficacy to produce more light output per unit power input.

LED lights function efficiently at low temperatures. The optimum temperature they work efficiently is 25 degrees centigrade. Thus, there is a chance of low signal intensities in the LED lights used for traffic signals. The right place for installation of LED lights is supermarket freezer lighting. However, they too generate little amount of heat and the use of LED’s in the aviation lighting of snow prone areas may cause certain problems. Research is being conducted in heat sink technologies to transfer the generated unwanted heat.

Lastly, the devices in which the LED lights are being used are safe except for that of the extremely bright LED lights. These are found to cause temporary blindness as they leach lead at levels above the hazardous limit.

What is making LED lights more popular than Fluorescent lights?

Both LED and fluorescent lights help in saving the electricity when compared to the incandescent lights. Then what are the special features of LED lights that are attracting every one?

• The LED lights do not use any harmful and toxic chemicals. Whereas fluorescent bulbs use toxic chemicals. Hence, if a LED light is broken there is not much harm to the environment but a fluorescent bulb would add certain toxic chemicals. Thus, LED’s are more eco-friendly compared to fluorescent bulbs.
• Though both LED lights and fluorescent lights use less amount of power, the LED’s are even more saving compared to the fluorescent lights.
• The difference in the amount of heat generated is another factor that is increasing the usage of the LED lights. The amount of heat generated by them is less compared to the fluorescent bulbs. Hence, the costs incurred in cooling the environment that is using the fluorescent bulbs will be higher than LED lights.
• The two types of bulbs differ in the degree of safety. As fluorescent bulbs are made of toxic chemicals such as mercury they are not safe to use in commercial freezers where food is stored. If the bulb breaks accidentally, the food materials will be subject to mercury poisoning. However, such danger of food poisoning is not associated with LED lights.
• Another drawback of fluorescent bulbs is that they are hard to dispose after use. As they are to be safely disposed, certain amount of fee has to be paid to handle them specially.
• The LED lights also have a longer lifespan of nearly 60,000 hours which is very high compared to the 10,000 hours of fluorescent lights. Hence, the LED lights do not have to be replaced for years.
• The two bulbs also differ in the extent of energy consumption. The LED lights use only 6 watts of power rather than 14 watts used by fluorescent lights. It is not only the extent of energy consumption they differ in the energy efficiency too. LED lights provide more light for each watt of power consumed when compared to the fluorescent lights.
• The LED lights are best recommended for directional lighting where light has to be focused on a single point. These are mainly used in flashlights, desk lamps, vehicle headlights and in certain electronic devices. But, the fluorescent light bulbs are suitable for lighting up the entire room. Hence, fluorescent bulbs are ideal for warehouses and household purposes.

• One last difference between the LED lights and the fluorescent bulbs is the cost. LED’s are expensive than fluorescent lights but they save on power during usage. If the overall costs of each of these bulbs during their life time are calculated, it would definitely be less for LED’s.

Basing on the above given difference, it is clear that LED’s are more useful, eco-friendly, inexpensive and even have longer life time. It is these features that are increasing the popularity of LED lights.

LED lighting – Save Electricity

LED lighting is the preferred lighting source especially, at commercial organizations. Every one of us need at least 8 hours of lighting daily. With the growing population and increased use of natural resources, there is a constant increase in the scarcity of electricity. Hence, it is the responsibility of every individual to reduce the consumption of electricity. An easy way to save electricity is by installing LED lighting systems.

The use of LED lighting can reduce the power bills by about 70%. In the LED lighting systems, the light source is a light emitting diode. An LED is a semiconductor which when switched on initiates the movement of electrons and combines them with holes resulting in the flow of electricity and thus the light source. This functioning of LED is based on the principle of electroluminescence. As we all observe, LED lighting can be of different colors. The color of the LED lighting is determined by the energy gap of the semiconductor. To assist in greater reflection of the light, the LED is provided with additional optical components.

The use of LED lighting systems has gained popularity because of the advantages offered by them.

• The advantages of using LED lighting are reduction in the usage of electricity, extended lifetime, robustness, small size and the faster switching ability. On top of all these advantages, LED lighting offers more intensity of light per watt.
• The LED light source is considered beneficial compared to other light sources such as the incandescent light, CFL’s and tubes. It is just because of the above given advantages and the low heat generation ability. As they generate less amount of heat, they are right for use even at places of social gatherings where extreme lighting is required.
• An attractive feature that is definitely aiding in the increased use of LED lighting systems is their eco-friendly nature. Unlike other lighting sources, they do not use any harmful gases such as mercury or sodium and as said above do not generate much heat. This system of lighting can be said as eligible for Carbon Credits. As harmful gases and heat are not being eliminated they also serve to reduce the green house effect.
• Another advantage of using the LED lighting is lower maintenance costs. Due to their longer life time, it is not required to replace them every now and then.

Despite of the above advantages, there is one single disadvantage which is the huge upfront costs. But this cannot be considered as disadvantage as they help to save money in the long run.

The structures of the LED lighting systems that are available in the market have a highly robust polymer casing and a microcontroller based circuitry. These microcontroller circuits help in providing uninterrupted bright light for nearly 70-80 hours. A lead acid battery is generally used to charge them. A specific is required for charging them. There are entrepreneurs offering the charging facilities to the LED lighting systems for a small fee.

Lastly, the LED lighting systems with simple design and many advantages can be said as a right way for saving the electricity and make the natural resources available even for future generations.

Solar LED lighting – A Cost Effective Solution for Commercial Lighting needs

Solar LED lighting is the best way to offer light source by harnessing the natural resources i.e. the solar energy. It would give zero energy bills as the solar energy can be obtained free of cost. Solar LED lighting fixtures for interior as well as exterior needs are available in the market. This way of lighting can be said as eco-friendly due to very less consumption of electricity.

In the construction of solar LED lighting systems generally lead acid battery, a photo sensor, fuse and a Low Voltage Disconnect. The usage of the solar LED lighting system can be increased by adding extra solar panels. For example, the inclusion of an additional 10watt or 20 watt solar panel would offer an additional light source of 350ma and 700ma respectively. However, with the inclusion of extra solar panel it is also essential to install extra battery which would obviously make a larger model.

Benefits of solar LED lighting:

There are a variety of locations where solar LED lighting could be an apt light source. Here are few situations where usage of solar LED’s is beneficial.

• Solar LED lighting for gardens: this is right place to trap the solar energy and use it as a source of light. The solar LED’s are available in the affordable limit as they cost less and also consume very less power. Another good reason for installing solar LED lighting at gardens is they have very high lifetime i.e. they last for about 100,000 hours on an average.
• Solar LED lighting for signs: the sign lighting used for commercial purposes is very expensive. Most of the costs are incurred in the form of running an underground wire to connect to the main electrical system and also the power consumption to run the lights. By using the solar LED lighting for signs, the costs for sign lighting can be reduced by thousands of dollars as they eliminate the need for underground wiring as well as drastically reduce the power consumption.
• Solar LED lighting for security purposes: the traditional security lights have certain disadvantages and are also very expensive. By using the solar LED’s these drawbacks can be rectified. For example, the solar LED lighting systems used for security purposes have a motion sensor that gets activated when someone moves in front of the light. They too reduce the regular monthly maintenance expenses as well as eliminate the need for connecting to the central electric system.

If you are not aware of best brands offering the solar LED lighting systems, you can search over the internet where you can find a variety of brands that are available in your local market. To select the right manufacturer, check for the reviews. Select the solar LED lighting supplier with best reviews as well as the customer service i.e. faster delivery of the product and attending to the maintenance needs in a short time period. If you are not sure of the features offered by their LED lighting systems, you can just enquire them by giving phone call or visit the store in person if possible.

By LED Lights & LED Lighting
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