2) Characteristics: 1. High luminous efficiency: Sc-Na system 120 lumens / watt (lm / w). Dy-Tl system of 83 lumens / watt (lm / w). 2. The color is excellent proof lighting outlet, because the continuous spectrum of light to get comfortable. 3. life, luminous flux maintenance factor other geometric HID lamp is poor. 4. Start, and then start the time is longer than the other HID lamps, and is susceptible to changes in the supply voltage can be used in explosive gas atmospheres have cast light explosion proof lighting standards _ _ Koretoyo west proof lighting by Zhejiang Koretoyo explosion-proof electrical Co., Ltd. Tianjin offices. Zhejiang Koretoyo explosion-proof electrical Ltd. Tianjin Office (#) is Tianjin, explosion-proof lighting leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Koretoyo explosion in leadership with the staff warmly welcome all inquiries to discuss, but to create a better future abundance of proof.