The technical indicators of LED lighting sources are as follows:

 

    Luminous wavelength: The intensity of hair color changes can be described by data. This kind of data is more than wavelength. The wavelength of light we can see ranges from 380 to 780mm. Unit: nanometer.

    Brightness: Brightness refers to the degree of lightness and darkness of an object, defined as the luminous intensity per unit area. Unit: nit

    Luminous Intensity (luminosity): Luminous intensity (luminosity, I) is defined as the luminous intensity of a point source in a certain direction, ie the amount of light emitted by a luminous body per unit of time. It is also referred to simply as the luminous intensity. Commonly used units are candlelight (cd (Candela)) An international candlelight is defined as a candle that is made of whale fat and burns a luminous intensity of 120 grains per hour, with a cold equal to 0.0648 grams. Luminous intensity is commonly measured in candelas (cd, candela), and international standard candid (lcd) is defined as the ideal blackbody at 600°C in the direction of platinum solidification point temperature (1769°C) and perpendicular to blackbody (its surface area is 1m2). The luminosity of one, the so-called ideal black body, means that the radiation of the object is equal to one, and the energy absorbed by the object can be completely radiated so that the temperature remains uniform and fixed. The interchangeability between candela and the old standard candle is 1candela=0.981candle.

    Luminous flux: The definition of luminous flux is: the energy emitted by a point light source or a non-point light source within a unit of time. Among them, a visual person (a radiant flux that people can feel) is called luminous flux. Luminous flux is expressed in lumens (lm) and 1 lumen (lumen or lm) is defined as an international standard candle area of ??4r2, so the first-class luminous flux is equal to 1/4 of the luminous flux emitted by a candlelight, or there is a sphere of 4, so according to The definition of lumens shows that a cd point light source will radiate 4 lumens, ie, lumen = 4I (candlelight).

    Color rendering index: A parameter that accurately describes the color rendering of a light source, expressed as Ra. The color rendering of the illuminant (sunlight) is Ra=100 (ie, any object has the most realistic color or texture under the irradiation of sunlight).

    Illumination: Illumination (E) is defined as the luminous flux received in the illuminated area of ??the illuminated object, or the luminous intensity per unit area per unit of time received by the illuminated object in meters or feet of candlelight ( Fcc) indicates. The relationship between illuminance and luminosity, distance is: E (illuminance) = I (luminosity) / r2 (distance squared). Illumination intensity of illuminance and luminosity of the subject and the distance between the memo body and the light source have a tube, irrespective of the color, surface property, and surface area size of the object.