In the past, when we used incandescent bulbs, we only knew how many watts we used, the larger the wattage, the brighter. That's right. However, the wattage of a lamp actually represents just how much power it consumes, and does not mean how much light it sends.
This problem becomes more and more important with the appearance of different types of lamps.
The emergence of fluorescent lights has created problems, the first fluorescent lamp used is usually called fluorescent lamps. Fortunately, the most common fluorescent lamp is only 1.2m T8 lamp. So we do not know how many watts it consumes, only know that the incandescent lamp to save electricity, in fact, the most common fluorescent lamp power consumption depends on what kind of ballast. The lamp itself is 36 watts, if the use of domestic inductance ballast, usually plus 10W power consumption, so the whole lamp power consumption is 46 watts. The average user may not know. The emergence of "energy-saving lamp" after the new situation, in fact, the so-called energy-saving lamp is just a curved light fluorescent lamp, called it energy-saving lamps just to use the term "energy-saving" to beautify it. The most commonly used energy-saving lamp is 8W, its brightness is equivalent to 40 watts incandescent lamp. But the biggest drawback of energy-saving lamps is mercury, which can contaminate 180 tons of water and soil. But the country is doing its best to promote "energy-saving Lights", in Shanghai and even every home by the country to send a white (do not know whether there is a big company behind the drive), since the country to promote to the end of 2012, has been hundreds of millions of energy-saving lamps scrapped, has polluted 18 billion tons of water and soil, and this pollution is not removed. No wonder the online rumors that Chinese immigrants to the United States to check the body found that mercury in the body is 100 times times more than the standard, this is not surprising.