In the future, led downlights will definitely become the first new generation of lighting fixtures to replace traditional lighting, and it will quickly enter the general lighting field and trigger new changes. It is not only energy saving and environmental protection, but also has the characteristics of long life and high light efficiency.
LED performance indicators are the core part of led downlights. Only by understanding its performance indicators can we have a deeper understanding of led downlights, so that the development and sales of future products will be more relaxed and free, and it is also very necessary to understand the knowledge . The following briefly analyzes the performance indicators of LED downlights.
1. If the reverse voltage VRM of the led downlight exceeds a certain value, the downlight may be damaged by breakdown.
2. The voltage of the led downlight: Generally speaking, the forward voltage of the led ceiling spotlight is that the positive pole of the led is connected to the positive pole of the power supply, and the negative pole is connected to the negative pole of the power supply. There is a certain connection between voltage and color. For example, the voltage of red, yellow, and yellow-green is between 1.8-2.4v; the voltage of white, blue, and aquamarine is between 3.0-3.6v. However, there may be some differences in the voltage of the same batch of LEDs, which should be based on the information provided by the manufacturer. When the outside temperature rises, VF will drop.
3. The color temperature of the led downlight: expressed in absolute temperature K, the standard black body is heated, when the temperature rises to a certain level, the color will start to change from dark red-light red-orange-white-blue. , A light source and the color of the black body match. The absolute temperature of the black body at that time is usually called the color temperature of the light source.
4. The color of the led downlight: the color of the led is a very important indicator, and every led downlight product will be marked as necessary. Now the colors of led are mainly red, green, blue, cyan, yellow, white, warm white, amber and other colors. This parameter of the color part must not be forgotten. Due to different colors, the related parameters will also change greatly.
5. The current of the led downlight: the forward limit current of the led is mostly 20MA, and the light decay current of the led cannot be greater than IF/3, which is about 15MA and 18MA. The luminous intensity of led is only proportional to IF within a certain range. When IF>20MA, the enhancement of its brightness cannot be distinguished by the naked eye. Therefore, the working current of led will generally be selected around 17-19MA, which is more reasonable.