Due to their various applications in the industry & now even in day to day life I thought to write some thing on this topic for the benefit of all.
Currently we have three major options for lighting purpose.
1. Incandescent Lamps
2. Fluorescent Lamps
3. Light Emitting Diodes (LED)
Incandescent lamps or old conventional light bulbs produce light by converting electric energy into heat energy thereby generating illumination of visible range. They are very easy to produce but the disadvantage is that they are very less efficient in terms of energy consumption which is generally measures as illumination / watt OR Lumens/watt or Lux.
Fluorescent lamps on the other hand work on UV light which is generated by passing current through mercury vapors. The ultraviolet light is then absorbed by a phosphor coating inside the lamp, causing it to glow, or fluoresce. They are generally costlier by 5 to 10 times compared to incandescent lamps. Their efficiency is still poor & they also involve the risk of some mercury vapors (generally very less).
LEDs work on semiconductor technology & are much more efficient than any other form. LEDs produce more light per watt compared to any other lamp or bulb. They can emit light of any type of desired color without the use of color filters that traditional lighting methods require. This is more efficient and can lower initial costs.
Advantages of LEDs
- LEDs can be very small.
- LEDs are Ideal for use where frequent on-off cycling is required. Fluorescent lamps burn out much more quickly in this condition.
- LEDs can very easily be dimmed. This is a very good property of LEDs where most of other lights may fail.
- In contrast to most light sources, LEDs emit very less heat which may be damaging to the surroundings due to its IR nature.
- LEDs life is more than 2 to 3 times compared to fluorescent tubes while it may be 5 times or greater compared to incandescent lamps.
- LEDs do not contain mercury or any other harmful vapors which are unfriendly to the environment.
- LEDs are now available in the size of more than 12W or even up to 20W.
Applications of LEDs
Decorative lights on interiors, exteriors, parks, walls etc., Night lights, walkway, stair lighting, ceiling lights, porch and landscaping lights.
Car bulbs as LEDs are now available in high power of more than 5W, may be 12W and as high as 20W also sometimes.
Underbody car LED kits come in a range of exciting colors and forms. These kits are equipped with remote controls and are capable of operating in different modes, for example flashing, strobing, chasing, phasing etc. Modern high quality underbody kits also come with sound systems and they can be set to 12 different functions. Multi-color strobe lights for cars are liked by car lovers across the globe because they look amazing. These are the latest advancement in the car parts industry and have been predicted to replace ordinary car kits in the future. They come with high-intensity, wide angle LED’s housed in strong and long-lasting tubes.
LED lighting for cars is not limited to underbody car kits. Exterior car lights are also quite popular and well-liked. These lights include bumper guard lights, third-brake lights, running lights, and multi-purpose light tube strips. In addition to these, popular manufacturers are also providing position and side marker lights for cars. All these lights are quite inexpensive and can be installed easily. High power LED modules come in various colors including cool and warm white, blue, green, red and yellow. LED multiplexing is the future of LED lighting in cars which will produce brighter, more efficient and more flexible lights.
LED light bulbs are used for a variety of purposes in homes. Recessed ceiling lights can be used for lighting up a hallway or passage. These bulbs come in three shapes: MR (Multi Reflector), Universal, and PAR type. MR and PAR types are normally used for focused or directional lighting. They are ideal to be used in night or reading lamps. Universal LED bulbs, on the other hand, can be used for general lighting purposes. These bulbs replace ordinary incandescent bulbs and range in wattage from 3.3 Watt to 15 Watt. Most of these lights are made waterproof and come in various levels of brightness.
Linear LED lights used in homes are available as light bars, rope lights, net & string lights, track lights, and signage & back lights. These types of lights can light up an entire cabinet or shelf. They are known as linear because they consist of a number of small LED’s aligned in a case. Rope lights are perfect for parties and outdoor decoration. They come in a variety of colors and look amazing stretched out on the floor. The latest rope lights come in durable glass tubing and simple electrical connections. They are very flexible and quite easy to install.
Architectural and track lights can also be used to decorate and light up the interior of an office. These lights produce enough illumination for all kinds of operations. Doorways, closets and lobbies can be lit up by using signage lights. These lights are available in the form of daisy chains and are very high power. Sign boards can be effectively constructed by using these lights which are totally waterproof and robust. LED architectural lights are available as street lights, wall washers, path lights and panel lights. LED street lights save money and energy and are very reliable.
Wall washers are extensively used in buildings and homes to illuminate an entire wall. They look beautiful from a distance and can be used to make a building stand out from the rest. The best thing about these lights is that they are not very expensive. The intensity of these lights can be controlled through a remote control along with their color and speed.
Deco, underground, lawn, ceiling, lamp, pool and many other types of LED lighting are admired by people all over the world. These lights are not only affordable but also last for many years. LED’s scatter heat quickly and therefore do not heap up like incandescent bulbs. They can be fitted anywhere because of their small size and adjustable design. Lawn lights look really pretty and they come in various colors including white, green, red and yellow.