Safety requirements: The cross-sectional area of the internal wiring of the lamp should not be less than 0.5 square millimeters to 0.75 square millimeters for the external wiring. Luminaires should be durable to use. Fluorescent lamps should use ballasts that not only operate normally but also provide abnormal protection in the event of lamp tube aging or damage. The shell, lampshade, and insulated lampholder of incandescent lamps should not burn or deform during durability testing. Adequate creepage distance and electrical clearance. The insulation materials of the main safety components in the lighting fixtures should be heat-resistant and fire-resistant. Luminaires should have sufficient protective measures against electric shock. Luminaires should have reasonable structural design and complete processing technology. Luminaires should be equipped with flexible wire fixing brackets. Luminaires should have sufficient stability. The electromagnetic interference of lighting fixtures should be within the limits specified in the standard. The harmonic current of the lamp should be within the limits specified in the standard. Purchasing method: Table lamps are the most common type of portable universal lighting fixtures, and are also essential lighting products for students' desks and teachers' desks. Due to the age range of users and the involvement of children, product safety is particularly important. When purchasing, the safety and quality of the lighting fixtures should be considered first, followed by factors such as performance and appearance. 1. Go to legitimate stores and buy legitimate products. To obtain a formal invoice, do not buy products that are too cheap. Choose products with the "Three Guarantees" promise and choose lighting fixtures with the 3C certification mark. 2. Advertising and promotion are for reference only. It is important to consult the inspection report, especially to check whether the items such as electric shock protection, durability test, and combustion resistance in the inspection report are qualified. 3. When choosing, one should look three times. At first glance, to see if the product identification is complete, formal product identification is often more standardized. At least the following content should be identified: trademark and factory name, product model specifications, rated voltage, rated frequency, and rated power. Verify whether the product model matches the model specifications in the inspection report and safety certification certificate, and whether the electrical parameters are correctly identified; Secondly, check if the power cord of the lamp has a CCC safety certification mark, and the cross-sectional area of the external wire should be 0.75 square millimeters; Three times, check if the charged body of the lamp is exposed. After the light source is installed in the lamp holder, fingers should not touch the charged metal lamp head. 4. Choose a desk lamp with a higher level of anti electric shock protection category. According to the type of anti electric shock protection, the desk lamp can be divided into categories 0, I, II, and III. The products sold on the market mostly belong to Class 0 or Class II, and Class 0 lamps rely on basic insulation as protection against electric shock. If the basic insulation fails, it is easy to generate electric shock hazards. The anti electric shock protection of Class III lighting fixtures not only relies on basic insulation, but also has additional safety measures, such as double insulation or reinforced insulation. In case of basic insulation failure, it can also rely on supplementary insulation protection. Try to purchase Class II lamps marked with the "return" symbol. When choosing a desk lamp for children, it is advisable to avoid purchasing metal shell desk lamps with high heat output from light sources, such as incandescent desk lamps and halogen tungsten desk lamps. At the same time, attention should also be paid to the smoothness of the lighting fixtures when purchasing to prevent them from tipping over due to improper placement. The stability of the lamp can be judged by tilting it 6 degrees to see if it has overturned