Introduction to Double ended Fluorescent Lamp: Double ended fluorescent lamp, also known as straight tube fluorescent lamp, is a traditional lighting source that uses ultraviolet light generated by low-pressure mercury vapor to excite the fluorescent powder coating and emit light Classification: According to power, it can be divided into 40W, 36W, 20W, 15W, and 8W. According to the size of fluorescent lamp tube diameter, it can be divided into: T12 diameter 38mm, T10 diameter 32mm, T9 diameter 29mm, T8 diameter 26mm, T5 diameter 16mm How to choose: When choosing a light tube, you should first determine the specifications according to your needs: There are many specifications for straight tube fluorescent lamps, and tubes of the same power have different diameters, thicknesses, and luminescent colors. The selection of lamp thickness mainly depends on whether it is coordinated and aesthetically pleasing with the appearance of the lamps used. The selection of the light emitting color of the lamp tube is mainly based on personal preferences. For example, if you like the light color to be "cold", you can purchase a lamp tube marked with the letters RR, RZ, RL, RB; For those who like the color of the light to "warm up", they can purchase a light tube labeled with the letters RN and RD. The light emitting color of the tube is light yellow, which is relatively soft. When choosing a light tube, the first thing to do is to look at the label, read the packaging or instructions clearly, and ask a few more questions about unknown information, which may reveal many problems and provide some information assistance for purchasing. Beware of buying products that counterfeit their origin, use someone else's factory name, or use certification labels. Some old brands have won the trust of consumers, leading to some illegal manufacturers forging the origin and using other brands, especially the "three no" products, which cannot be bought. Secondly, look at the appearance, such as whether the lamp feet are loose, and whether the fluorescent powder coating of the lamp tube is even and without holidays. The third way is to light up the lamp tube to see if it emits light normally and evenly, and the lamp tube should have no dark spots When using a lamp, attention should be paid to: 1. To extend the service life of the lamp, frequent switching should be avoided. If both ends of the lamp tube have become severely blackened, in order to not affect the lighting effect, the lamp tube should be replaced in a timely manner. 3. When replacing the lamp tube, the power should be disconnected. 4. The lamp contains toxic mercury, and damage to the lamp should be avoided as much as possible