Frequent natural disasters, portable lighting is widely used In recent years, around the world, the natural and social disasters. For example, the Indian Ocean tsunami in 2004, caused 15 million deaths, hundreds of thousands of people homeless Normalized; 2005 South Asia earthquake, resulting in more than 300 million people were left homeless; 2008 Wenchuan earthquake; 2010, Haiti earthquake, resulting in 11 people were killed and more than 300 million People become refugees; tsunami in Japan in 2011. Frequent natural disasters caused massive destruction disaster area power facilities and other public facilities, electricity facilities in paralysis Paralyzed state, pose significant obstacles to the launching of the emergency relief work of the disaster area, the electricity shortage brought great inconvenience to the daily life of the people in the disaster areas Portable lighting as disasters, power supply supplementary measures for relief work fast to launch and maintain the basic daily-life lighting play An irreplaceable role, portable lighting is also a wide range of applications. Has a strong mass base as outdoor supplies part of Europe and the United States developed economy, coupled with a healthy natural environment and people's yearning for a healthy lifestyle, outdoor sports quite a broad mass base for Outdoor industry provides the fundamental motivation. According to the report released by the OIF "The Active Outdoor Recreation Economy "American outdoor sporting goods annual retail sales in 2006 reached $ 46 billion. According to the data of the "mountain" magazine, the European Outdoor Line Industry from 2001 to 2006, the average growth rate of 7%, its growth rate is higher than the overall economic growth rate for the same period in Europe. Accompanied by a wide range of outdoor lifestyle Communication, mass consumption habits of outdoor supplies gradually changed Outdoor has a number of models, quality and performance and stylish appearance of the congregation And more features, more and more consumers perceived and loved. Portable lamps as part of outdoor products, showing the rapid development of sunrise industries strong Momentum. Therefore, the people in the day-to-day life will choose outdoor supplies.