led lamps and fixtures – is the fastest growing industries in the field of led products. It has already transformed our lives, giving us a unique energogsberegayuschie projects, for example led coverage of the whole island (North Dumpling Island) led lamps and lighting fixtures. What can you expect from a semiconductor technology in the field of energy and energy conservation? The most obvious (but not unique) perspective – it alternative form of lighting, which should in time take the place of our usual incandescent bulbs. We explain the principle of action of various lighting and consider the energy conversion efficiency for each of them. Normal incandescent bulb, only 10% received energy radiates in the form of useful light, and it is not white, and yellow.
The remaining 90% is spent on heating. Why so low efficiency and can be any way to fix this? The fact is that in such a light bulb, as you know, glows red-hot coil, and the emission spectrum of a heated body depends mainly on its temperature. Our eyes adjusted to capture the light emitted by the Sun's surface, which is red-hot up to 6000 degrees. In other words, the sunlight on its spectral composition as the optimal time for an eye. Cecilia Shen may not feel the same. The filament in the bulb, of course, has a much lower temperature, so it is lit in a very different spectral range (IR), and only a small fraction of the emitted light bulb light falls on the visible spectrum. How can that be? If the light source is an incandescent filament, then the only way to increase efficiency – is raise the temperature of the filament.