that ends with a positive voltage

LED lamps light the small plot, you can choose different combinations of light and color of LED soft illumination into various modules, any installed in the living room, bedroom lighting light source may come from the ground, walls, window sills, furniture, accessories and so on. Therefore,led bulbs the future will no longer be confined to a single room lighting, lamps, and lighting will be transformed into a single non-sense of the overall lighting effect of the shadowless lighting.
The light color and brightness of different human physiological and psychological effects can have different people in many cases do not need a very bright white,LED downlight yellow or other colors may be more suitable for light physical and psychological needs. Three-color LED brightness can be achieved, gray, color and choice of continuous transformation, making the light from the white light on the universal expansion for a variety of colors of light.
As we all know, the important invention of Edison incandescent lamp, this important invention of the human breaking away from the darkness and usher in the light, but too much power incandescent lamp, and it is probably less than one tenth of the energy of the light energy into , the other is thermal energy is wasted in vain, so people are seeking ways to use the new light source to replace incandescent lamps, energy saving lamps came into being. In contrast, because of its cheap and good production, so we get a lot of applications,LED tube there is a trend to gradually replace the incandescent lamp. Energy-saving lamps to replace incandescent lighting in the area known as the second revolution at the same time, LED lighting products to replace the traditional performance of more high-quality energy-saving lamps is also a trend, known as the second revolution in the field of lighting.
50 years ago, people have to understand the semiconductor material can produce light of the basic knowledge,LED light the first commercially available diodes in 1960. Its basic structure is an electroluminescent semiconductor material, placed in a wire rack, then sealed with epoxy resin around, play a protective role within the cores, so the LED's seismic performance.
The core part of the light-emitting diode is a p-type semiconductor and n-type semiconductor chip formed in the p-type semiconductor and n-type semiconductor between a transition layer, called the pn junction. In certain semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination, when will the excess energy released in the form of light to convert light energy directly into electrical energy. PN junction reverse voltage, minority-carrier injection is difficult, it is not light. The use of injection electroluminescent diodes called the principle of making light emitting diodes,dimmable LED lights commonly known as LED. When it is in working condition when a positive (that ends with a positive voltage), current from the LED anode to the cathode, the semiconductor crystals to the making of different colors from the ultraviolet to infrared light, light intensity and current.