What are the parameters of LED lighting products?

1. Luminous intensity Luminous intensity is the definition of the luminous flux emitted by a light source in a unit solid angle in a given direction. The luminous intensity of a light-emitting diode usually refers to the luminous intensity in the normal direction. The unit is candela (symbol cd). Since the luminous intensity of the general LED is small, the luminous intensity is often used as a unit of millicandela (mcd). 2. Brightness Brightness refers to the luminous intensity per unit area of u200bu200bthe illuminated object, and its measurement unit is nit (nit), 1nitu003d1cd/m2. 3. Luminous flux The luminous flux of a light source refers to the amount of light emitted by the light source in a unit time. The unit is lumens (lm). 4. Illumination The intensity of the high-pole light source shining on the object is expressed by the illuminance, and the intensity of the reflected light from the object to the eyes is expressed by the brightness. The same lamp shines on white paper and black paper at the same distance, with the same illuminance and different brightness. Illuminance X reflectivity is called brightness. The luminous flux of lumens is evenly distributed on a surface of 1 square meter. In lux (lx), 1 lx u003d 1 lm/m2. 5. Luminous efficiency of LED Luminous efficiency is an important indicator to measure the energy saving of a light source, which is the luminous flux emitted by the light source divided by the power consumed by the light source. Unit: lumen per watt (lm/W). The product of the current through the LED and the forward voltage drop of the LED is the power consumption of the LED, of which only part of the electrical energy is converted into light energy, and the other part of the electrical energy is converted into heat energy. 6. Color rendering index of LED The color rendering of the light source is indicated by the color rendering index (Ra), which indicates the degree of deviation of the color of the object under illumination compared with the color of the reference light, which can more comprehensively reflect the color characteristics of the light source. The color rendering index of the sun is set as 100, and the color rendering index of various light sources is different, such as: high pressure sodium lamp color rendering index Rau003d23, fluorescent tube color rendering index Rau003d60～90. The color rendering index of the white LED is Ra>70. [The above content is organized and released by solar street light manufacturers for you]
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