我们知道,普通的白炽灯是由美国著名发明家托马斯.安迪生于1879年研制成功的。该项发明是对蜡烛的巨大改进。但是,白炽灯的发光原理仍离不开加热。白炽灯约有90%的电能转换成热而被白白浪费掉。通常情况下,灯丝的寿命也仅有一年半载。后来,人们发明了荧光灯,它是靠激发涂在灯管内壁的磷微粒而发光的,从而克服了白炽灯的某些缺点,不过粗大的灯管仍限制了它的使用范围。 We know that the ordinary incandescent lamp was invented by the famous American inventor Thomas Anderson in 1879. This invention is a huge improvement on candles. However, the principle of incandescent light is still inseparable from heating. About 90% of the incandescent power is converted into heat and was wasted. Under normal circumstances, the filament life is only a year and a half carrying. Later, people invented the fluorescent lamp, which is by activating the phosphor particles coated on the inner wall of the lamp and glow, thus overcoming some of the shortcomings of incandescent lamps, but still limits the scope of its use of large lamps.