Bulb purchase knowledge

When we buy household products, we must firmly grasp two points: one is functionality; the other is visual beauty.　　

　　 For lamps in the home, its functionality is especially important, because the functionality of a lamp is not only reflected in illuminance, but also in safety. In order to make all the lights in the home work efficiently and safely, you need to pay attention to the light source (bulb, tube), switch, and socket when purchasing. The most secure and worry-free way is to buy at a rest assured store. Brand products, but when various brands of products are gathered together, how do they compare? After consulting several professionals, the reporter provided the following experience.

　　 There are three main types of light sources currently on the market: traditional bulbs, light tubes and energy-saving lamps. In addition, with the advancement of technology, there is now a new light source called semiconductor lighting.　　

　　For traditional light bulbs and ordinary light tubes, the Chinese have used them for decades, and the production technology is also very mature. The quality of this type of light source produced by most manufacturers can be guaranteed. However, the defect of this type of light source is that it is easy to wear, and the voltage will be "burned" when the voltage is unstable. Therefore, when using this type of light source, pay attention to the flexible disassembly of the lampshade to facilitate replacement.

　　 Energy-saving lamps are gradually becoming mainstream products on the market due to their advantages over traditional light sources, such as energy saving, long life, strong voltage adaptability, and high reduction. Due to the high profits of this kind of products, manufacturers of large and small have launched one after another, so special attention should be paid to the purchase of energy-saving lamps.

　　 Generally speaking, the safety performance of the light source is directly reflected in the Great Wall logo and other safety certifications. In addition to paying attention to these signs, it is best to test the lights on site when purchasing. The specific method is to install a cold-state lamp, leave the lamp with your hand, and turn on the power to light it once. The “one-time light” here should be understood as the least or no flicker when starting, the root of the tube No red light can appear. Some energy-saving lamps are equipped with a lamp wire preheating circuit when starting, and there will be a delay of about 0.4 seconds when starting. Let the lamp work for a few minutes, and observe whether there is any peculiar smell above the lamp when its temperature rises. Finally, look at the temperature of the lamp body after power off. The lower the temperature, the better.

　　 The high-quality energy-saving lamps have several notable features. One is that they can truly restore colors, and the other is that they are rich in color temperature types. The commonly used color temperature grades of energy-saving lamps range from 2700K-6400K, which are sufficient to meet the lighting needs of the family in various situations. The low color temperature lamp below 3000K can get the warmth effect of incandescent lamp. If you want to obtain the clear and bright lighting effect, the high color temperature lamp above 5000K is very suitable.

　　 When disassembling and assembling energy-saving lamps, do not hold the part of the lamp tube to prevent it from being broken by force. For lamps with startup failures, after disconnecting the power supply, there may still be high-voltage electricity remaining in some parts, so you need to pay attention to safety. When the weather is too cold or the voltage is too low, the lamp has a poor start-up phenomenon, do not let the lamp be always in the high-current start-up state when the lamp tube is red, and it can be quickly turned off and then energized again.

　　 When using energy-saving lamps, pay attention to the use environment, and do not use them in high temperature and high humidity environments. Especially compact energy-saving lamps, because of their internal high-frequency and high-pressure working state, the heat dissipation conditions are slightly poor. Therefore, under the conditions of high temperature and high humidity, it is easy to cause the phenomenon of magnetic material degeneration and discharge between lines. Bathrooms and kitchens should try to avoid using such lights.