The increasing demand of electric energy in the last times, compels the countries to invest in infrastructure for energy generation. It is a high investment. Being thus, the energy efficiency is a subject that has gained each time more importance. Lately the LEDs has come to substitute incandescent, halgenas and even though fluorescent light bulbs in many applications, including traffic lights and public illumination. Although the compact fluorescent light bulbs still to be the option most efficient the optimum cost, the LEDs are in fast technological development and soon they tend to gain the residential market to the measure that has reduction of the production costs.
Had the advances of the technology and improvements in the productive processes, light bulbs LED soon will become accessible for the average consumer. The Department of Energy of U.S.A. esteem that illumination LED could reduce the consumption of the energy used for illumination in the country in 29% up to 2025. The economy of the families of the country he would be something around US$ 125 billion in this process. The incandescent light bulb practically did not move since its invention in 1879 for Thomas Edison. The efficiency of an incandescent light bulb is something around 5 10%.
This means that only 5 10% of the consumed energy are transformed into illumination, whereas 90 95% of the remaining energy are lost in heat form. Instead of this, the LEDs generates little heat, transferring most of the consumed energy very directly to the emitted light. The most recent technologies allow that the LEDs can produce the same amount of light that a compact fluorescent light bulb. The applications in general illumination still possess cost restriction, but the LEDs already this being widely applied in illumination of prominence and architectural illumination, which had its characteristics of color and long useful life, that maintenance requires low. The white light emitted by the LED possesss a specter of pleasant color, coming close itself to the light of the day. It has also LEDs that emits a softer light, coming close itself to the temperature of color of the incandescent lmpadas ones (3000K). The temperature of softer color is ideal for environment illumination where if it desires a climate aconchegante, as rooms, while the white illumination is ideal for environments where it has execution of tasks, as for example, the illumination of offices. The other colors emitted for the LED also are purer in relation to the conventional light bulbs. The LEDs possesss saturated colors, while the other light bulbs have a color that it is distinguished more inside of a band of the specter.