The contemporary culture should thank Thomas Edison, an investor of America. The first white light was invented by him with company value, bringing light for the individual. However, Conrad Hubert deserved the same regard. A hundred years ago, he devised the torch.After home was gone by Hubert from work, a shining flowerpot was presented by a friend of his to him proudly. Actually, he place a small bulb and a battery in the flowerpot. One the light was on; the flower was lightened by the light, appearing delightful and brilliant. Hubert was amazed by it. Occasionally he walked through the night; the road can't be seen by him certainly, that was really inconvenient. He believed that if a torch could be used by him with him, isn't it quite suitable and practical? practical? As he set a battery and bulb flashlight in a tube, consequently the first torch arrived in to being, a result.As led torch has entering in to our existence, a sort of efficient lighting items. Now I'd talk about some features about led torch.Led torch consists of several diodes with high colour temperature, the visible perception it provides individuals is very vibrant, which is its attribute. Furthermore, it's power conserving, hours can be lasted more than ten by a battery (size size AAA NNS. And the outer covering of magnesium aluminum alloy can avoid rain, wind and erosion, making it suitable to be utilized outside. However, the main drawback of it's brief distance of irradiation, usually some twenty meters.And there are several other benefits of led flashlight: first, it's extremely energy-saving. It is helpful environmental. 2nd, it's has long lifetime. There's no free component within the light, and it doesn't have benefits of thermo precipitation and mild decay. The time can reach 60, 000 to 100, 000 hours, ten folds of the conventional source of light. Third, it is advantageous to protect the surroundings. The spectrum has no ultraviolet radiation, infrared ray, heat, or radiation. And the waste could be recycled. For it not have mercury component and does is not polluted. It may be touched securely, belonging to the traditional green lights supply. Fourth, it is manufactured with high technology. Compared with the monotonous delusion of convention lighting supply, the led flashlights is micro-electronics product, successfully integrating pc technologies, community communications, imaging processing technologies and embedded technology, so it's also digital informatization product with the characteristic of on-line application function, boundless upgrade and versatility.