There are many kinds of lamps on the market now, when we choose lamps, we often do not know where to start, which lamp is more suitable for ourselves? Which lamps should be used in different environments? Next, I will give you a brief introduction to some of the more common lamps on the market.
1. Incandescent lamp
The luminous principle of an incandescent lamp is to heat the filament to an incandescent state and use thermal radiation to emit visible light. Less than 10% of the electrical energy it consumes can be converted into light energy (only 2% of ordinary incandescent lamps), and the rest is lost in the form of heat energy. At the same time, the higher the temperature of the filament, the faster the tungsten filament evaporates, making the life of most incandescent lamps shorter. Therefore, although incandescent lamps have many advantages-the color of the light is closest to the color of the sun, the color rendering is good, the spectrum is uniform and not abrupt-but the waste of energy is huge. Since the beginning of 2007, the Australian government first announced the complete elimination of incandescent lamps in the form of legislation At the beginning, more than a dozen countries and regions have successively released incandescent lamp phase-out plans. my country has also gradually implemented a phase-out plan since 2011. By October 1, 2016, it is prohibited to sell and import incandescent lamps for general lighting of 15 watts and above.
Summary: If you want to use an incandescent lamp as a light source, it will indeed be difficult to purchase in the future.
2. Halogen lamp
The halogen lamp can be regarded as an upgraded version of the incandescent lamp. Referred to as halogen bulbs or halogen lamps, also known as tungsten halogen bulbs, quartz bulbs, is a variant of incandescent lamps. The principle is to inject halogen gas such as iodine or bromine into the bulb. At high temperature, the sublimated tungsten wire reacts with the halogen. The cooled tungsten will re-solidify on the tungsten wire to form a balanced cycle to avoid premature fracture of the tungsten wire . Therefore, halogen bulbs have a longer life than incandescent lamps (almost 4 times that of incandescent lamps), and at the same time, because the filament can work at a higher temperature, thereby obtaining higher brightness, higher color temperature and higher luminous efficiency. As an upgraded version of incandescent lamps, halogen lamps have all the advantages of incandescent lamps, but halogen lamps also inherit the disadvantages of incandescent lamps: short life (although they are longer than incandescent lamps), low luminous efficiency (although they are higher than incandescent lamps), Moreover, since the halogen lamp is also a heat radiation light source, during lighting or immediately after the lamp is turned off, since the temperature of the bulb is still very high, it must not be touched by hand. In addition, incandescent lamps and halogen lamps have a small amount of ultraviolet (UV) and infrared (IR) radiation problems. It is easy to cause facial skin problems. With ultraviolet radiation, it may even cause extreme conditions such as sun dermatitis. Summary: If you want to use a halogen lamp as a light source, you need at least UV protection treatment-in short, the part of the lamp head is best to have a layer of frosted or partially frosted and UV-resistant glass panel.
3. Ordinary fluorescent lamps
The long tubes we used when we were kids were fluorescent lamps, also known as fluorescent lamps. The traditional fluorescent lamp, that is, a low-pressure mercury lamp, uses the principle of low-pressure mercury vapor to release ultraviolet rays after being energized, so that the fluorescent powder emits visible light to emit light. Therefore, it belongs to a low-pressure arc discharge light source. Ordinary fluorescent tubes are coated with halogen fluorescent powder and filled with a mixture of argon and krypton argon. The light color is: cool white daylight fluorescent tube, warm white daylight fluorescent tube. Although fluorescent lamps are less hot than incandescent lamps and have a much higher luminous efficiency, these two light-color fluorescent tubes have lower color rendering performance and a color rendering index R value of less than 40. Far less than the standard value of sunlight, color rendering index R=100. Look at the color of the surface of a colored object to produce a color cast The color is greenish or grayish, and the color is dim and not bright. These two fluorescent lamps are not high-efficiency and energy-saving electric light sources, and do not meet the technical requirements of green lighting.
Summary: It is not enough to save energy and protect the environment./