Fluorescent lamps are an indoor lighting source that is superior to incandescent lamps. Fluorescent lamps with the same wattage are much brighter than incandescent lamps. Why is this?

It turns out that the two lamps have different lighting principles. Incandescent lamps can be very hot for a long time because they illuminate by the thermal effects of current through the filament. When any object is heated above 525 degrees Celsius, it will illuminate, and as the temperature increases, the luminous efficiency of the substance also increases. However, the melting point of the tungsten wire used to make the filament is as high as 3410 degrees Celsius, so incandescent lamps convert little of the electrical energy into light energy, and most of the electrical energy becomes thermal energy, which consumes too much electrical energy.

The principle of illuminating the fluorescent lamp is different. It mainly uses phosphor to convert the ultraviolet ray generated during the arc discharge of low-pressure mercury vapor into visible light. This way of illuminating causes the fluorescent lamp to generate little heat during the illuminating process, and emits a kind of luminescent light. In this way, most of the electrical energy is converted into light energy, and the luminous efficiency of the fluorescent lamp is much higher than that of the incandescent lamp.

From incandescent to fluorescent, resources are saved thanks to new ways. I believe that with the continuous efforts of scientists, there will be more lights in the future and brighter than fluorescent lights!