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自爱迪生发明白炽灯以来,电光源已经发展到第四代。第一代代表为白炽灯,优点有显色性好、成本低、使用安全,缺点为光效低、能耗大、寿命短;第二代代表为荧光灯,光效、寿命比白炽灯有所提高,但存在电磁污染、显色性差等问题;第三代为高强度气体放电灯,虽比前两代提高了寿命、光效,但是仍存在污染严重、维护困难等问题;第四代即为半导体照明,具有节能、环保、寿命长、光效高等优点。随着能源危机、环境危机的出现,采用
Since Edison invented incandescent lamps, electric light has been developed to the fourth generation. The first generation of representatives of incandescent lamps, the advantages of good color, low cost, safe use, the disadvantage of low luminous efficiency, energy consumption, short life expectancy; the second generation of representatives of fluorescent lamps, light efficiency, life expectancy than incandescent The third generation of high-intensity discharge lamps, although the previous two generations to improve life expectancy, light efficiency, but there are still serious pollution, maintenance difficulties and other issues; the fourth generation of For the semiconductor lighting, with energy saving, environmental protection, long life, high luminous efficiency advantages. With the energy crisis, the emergence of environmental crisis, adoption