Dry goods: teach you how to judge the quality of LED downlights! No better than not knowing! ||

Many customers report that they don't know how to judge the quality of LED downlights, and the 'one-sided word' of audio-visual lighting manufacturers is not the way. From an objective point of view, let’s see how to judge the quality of LED downlights more scientifically. As a manufacturer of LED downlights and other LED lighting fixtures, Optoelectronics teaches you how to judge the quality of LED downlights based on years of production, Ru0026D and project experience. 1. Overall appearance and parameters When purchasing an LED downlight, the first thing we have to do is to check the appearance of the lamp. In addition to seeing whether the appearance of the lamp body is smooth and whether the craftsmanship is in place, but also according to the needs of the project, carefully measure the lamp Whether the various conditions of physical appearance meet the demands. For example, whether the color of the lamp face ring meets the project requirements, whether the installation method is appropriate, whether the height, diameter and other parameters of the lamp body are consistent with the project requirements. 2. Stroboscopic situation The flicker of the downlight will threaten your eyesight health and the success of the project. It is recommended that you first ask for the data of the 'strobe depth' when purchasing an LED downlight. Furthermore, I will teach you a spontaneous trick to distinguish stroboscopic light. When you get the LED downlight, plug in the power supply to turn on the LED downlight, and then use the camera function of your mobile phone to close the light-emitting surface to see if there is stroboscopic phenomenon. 3. Comparison of light quality. In terms of comparison of light quality, you can turn on the same model of LED downlights produced by the same manufacturer at the same time, and observe whether the primary and secondary light spots, luminous colors and brightness are the same, as if there are obvious differences in a product, it proves It is a low-quality product. In theory, the downlight produced by the same manufacturer does not have the problem of inconsistent color and brightness. Look at the front and side spots of the front and side spots (especially observe whether there are side spots in the side spots). Fourth, the heat dissipation performance to judge whether the heat sink of a lamp is well done, the most direct method is to measure the temperature of the LED chip when the lamp is working , Namely 'junction temperature'. Here, we recommend using the 'half-hour illuminance method' to measure junction temperature to judge the quality of the radiator of the lamp. As the LED junction temperature increases, the luminous flux will decrease. Therefore, it is only necessary to measure the illuminance change of the lamp at the same position, and then the change in junction temperature can be deduced. Specific methods, choose a place free from external light interference, it is best to turn off other lights at night. , Turn on the light in the cold state, immediately measure the illuminance of a location, and write down the reading at this time as 'cold illuminance'. , Keep the position of the lamp and the illuminance meter unchanged, and the lamp will continue to work. , After half an hour, read the illuminance value here again, and write down the reading as 'hot illuminance'. , If the two values u200bu200bare similar (%), the heat dissipation system of this lamp is basically good. , If the two values u200bu200bare far apart (greater than %), the heat dissipation system of this lamp is questionable. Here is a list of the 'luminous flux vs junction temperature' curve of several product chips on the market, from which we can see how much lumens the luminous flux has dropped, and thus indirectly know how many degrees Celsius the junction temperature has risen. Figure OSLON SSL White chip, when the luminous flux is lower than ℃ by %, the junction temperature has exceeded ℃, and the heat dissipation system can basically be judged as unqualified. Figure OSRAM E () chip, when the luminous flux is lower than ℃, the junction temperature has exceeded ℃, it can basically be judged that the heat dissipation system is unqualified. Figure INFOR (photoelectric) IF-IDL chip, when the junction temperature increases from ℃ to ℃, the luminous flux rises against the sky. Then it starts to drop, and when it reaches °C, the luminous flux drops by about %. Basically, it can be judged that the cooling system is good. It is reported that the radiator of Optoelectronics LED downlight IF-IDL has the following advantages. It is made of all-aluminum material that meets national standards and combined with cold forging process. The product is optimized and improved from the structure to provide integrated heat dissipation. The device has no thermal resistance, uniform temperature, better than die-casting and stretching processes, and has an ideal heat dissipation effect. In general, based on the above points, the quality of LED downlights can basically be judged objectively. I hope you can choose the right lamps and do the project well. Shenzhen Optoelectronics Co., Ltd. Optoelectronics is a comprehensive lighting service enterprise integrating lamp design, research and development, production, sales, construction and installation. Provide overall lighting solutions for LED lighting projects such as airports, five-star hotels, commercial buildings, and designated lighting suppliers for domestic airports. Address: Floor, Changhong Technology Building, Nanshan High-tech Park, Shenzhen, Guangdong Province