How to judge the quality of a ceiling lamp?

How to judge the quality of a ceiling lamp? First of all, everyone must understand that a lamp (no matter what lamp) is composed of three parts: the lamp body, the light source and the electrical appliances. The most important thing is the light source, because it is the part that can really bring you the lighting effect. The lamp body is generally used for decoration and auxiliary light source. Electrical appliances are used to stabilize the light source or give the light source an instantaneous start voltage. Therefore, the light source is the most important for the lamp. How to judge whether the above indicators are good or bad? Because most ceiling lamps are white light, let's take a look at white light. When choosing lamps, some owners will find that some ceiling lamps look brighter, while some are darker, some are whitish, and some are purple or blue. This is due to the different light effects of the light source. It is caused by the difference in color temperature. The light source produced by some small manufacturers has low luminous efficiency, but in order to make the customer look brighter, the color temperature is increased to make it look brighter. In fact, it’s not really bright, it’s just an illusion of the human eye. This is more harmful to the eyes, and the eyes are easily fatigued. Under this environment for a long time, the eyesight will get worse and worse, so why do children easily become myopia? It is because of the bad light source of the desk. Lights with high color temperatures look bluish or purple. People in the industry know that the color temperature is wrong at first glance, but customers often don't see it. Here is a way to teach you that you don’t need other light sources, just light a lamp, and then stand under the lamp to read (if you choose a table lamp or an energy-saving lamp, read the book at a distance of m from the light source). If it looks clear and bright, it means that the light source is better and the luminous efficiency is high. If it is not clear, fuzzy, or not bright, it means that it is not really high in light efficiency, but just an illusion of the eyes. It is easier to judge whether the color temperature of a light source is too high. Reach the palm of your hand to the side of the light source and look at the color of the palm. If it is ruddy, it means that the color temperature is just right and the color rendering is good. If the palm of your hand is blue or purple, it means the color temperature. Too high. The judgment of the light source should start with the following points: Luminous flux: As the name implies, it is how much the light source emits. Color temperature: It is the temperature of the color of the light source, which is usually called yellow light and white light. In fact, it is not called that in the industry. It is usually expressed by a numerical value. Yellow light is below k; white light is above k; and there is another intermediate color; k-k;. Color rendering: the degree of reaction of the light source to the true color of the object. We believe that sunlight and incandescent lamps respond to the color of objects as *good and *real, so their color rendering is defined as the general color rendering index above is a better light source, but general ceiling lamps are more difficult to make To. Average life span: This is different from other things. Light sources refer to average life span, which means that a batch of light sources are lit at the same time. When% of the light sources fail, it is the average life span of this batch of light sources. Nowadays, the general ceiling lamps will be guaranteed for one year. In fact, their lifespan is much longer than one year, so you can use them with confidence. Light efficiency: This indicator is very important, it refers to how much light is emitted by different light sources at the same time, consuming the same amount of electricity. That is to say, the power consumed by the same bright light may be different. A light source with high luminous efficiency is definitely more power-efficient than a low-efficiency light source. Stroboscopic: The number of times the light source flickers per second. Why do some fluorescent lamps in some homes always feel that it is flickering? In fact, the electrical appliances are not good and can't provide him with a stable voltage. The large stroboscopic light source will damage the eyes the most, and it is fluorescent. The light source stroboscopic is more serious.