Light emitting diode, which is popularly known as LED, is a semiconductor device. This device is mainly used as a source of light. As soon as this device is switched on, current flows through the closed loop and the device starts working. In a closed circuit state, the electrons within the device flow to recombine with the holes. This movement of the electrons releases energy in the form of light. As a result this diode gives away light. The colour of the light emitted by an LED is solely determined by the energy band gap of the device. LEDs are mostly used in automotive lightings, advertising, traffic signals and all the related areas where a seven segment display is used. Infrared LEDs are also used in remote control devices of many home appliances like television, DVD players, AC machine etc.
But nowadays, LEDs are getting popularity as the source of light for general lighting too. LED lighting that can enlighten a room area generally uses powerful LEDs. The incandescent and fluorescent lights that were widely being used in domestic and commercial areas are getting replaced by LED lights very quickly. There is a long list of advantages behind this rapid rate of replacement. The main advantage of this light over its incandescent or fluorescent counterpart is the lower rate of power consumption. The energy efficiency feature of this device has made it a powerful competitor. The other advantages are longer lifetime, faster switching capability and smaller size.
The CFL lights, i.e., compact incandescent lamps are an advanced version of the general incandescent lights. Though not working upon the LED technology this lamp can save energy like those semiconductor devices. For the purpose of illumination these CFLs use mercury. This CFL globe is therefore another name added to the list of energy efficient home and commercial appliances. Back to the LED technology again, the LED globes are also offering lower power consumption features to replace the conventional halogen down lights and other indoor spotlights. This brand new technology can cut down the monthly electricity bill to a great extent.
Recently, the cordless cap lamp mining captured the market all over the world due to its energy efficiency, physical robustness, small size and long service life. Though these bulbs are expensive than the conventional fluorescent and incandescent lights, but one can definitely understand their worth when the positive features are taken into consideration. The amount of money that will be saved from the cut down on monthly electricity bills will repay the extra pennies spent while purchasing the device.
The LED flood lights are again another form of lighting sources that are used to illuminate a larger area and use the popular LED technology. Like all the other members of the LED family these flood lights are energy efficient. These lightweight and portable devices are fast replacing the halogen lights. Being a semiconductor device, these LED light sources use internal rectifiers to convert the AC power into DC of lower voltage. Solar flood light is also available in the market which does not even require the electric power to switch on. A ray of sunlight is enough for this device to give away lightly.