Solar cell is essentially a semiconductor device solar lighting production, it is typically characterized by light energy directly into electrical energy. If the built-in electric field on both sides of the extraction electrode connected to the load and solar lighting products, the load will have a "photocurrent", so sunlight is converted into electricity. When the optional special crystal LED light source, the light source life of more than 30 years. Solar lighting products, Qingdao Steel Yi (certified), solar lighting is provided by solar energy, Ltd. Qingdao Yi Gang. Qingdao Yi Steel Solar Limited (www.gangyisolar.com) is Qingdao, a leader in solar and renewable energy, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Yi Gang leader in Qingdao with the staff warmly welcome all inquiries negotiations to create Qingdao Yi Gang a better future.