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It is probably the state when you first see the four parameters of the light source. DAMAVO is a professional manufacturer of 12v dome light, 12v led van interior lights, led 12volt with stable quality and resonable cost.
Next, we will briefly and rudely introduce them from the definition.
Luminous Intensity (I, Intensity): (It is the inherent property of the point light source, which represents the ability of light to converge)
Definition: the luminous flux radiated by the light source in the specified direction and unit solid angle (unit steradian), the symbol is I, and the unit is the candela (cd).
Explanation: The luminous Intensity describes how "bright" the light source is. The greater the luminous Intensity, the brighter the light source looks, and the brighter the object illuminated by the light source under the same conditions.
Luminous flux : (It is the inherent property of the light source, and it is the total energy radiated by the light source per unit of time, that is, the optical power)
Definition: The light source radiates the energy to the surrounding space, making the human eye feel light in a unit of time. The symbol is Φ, and the unit is lumens (lm).
Explanation: The greater the luminous flux of the light source, the more light it emits. For example, the lumens marked on the package description of a lamp is 330lm, which means that the lamp
emits 330 units of light per second.
Illuminance (E, Illuminance)
Definition of Illuminance:
- The luminous flux received per unit area on the surface of an object.
- The symbol is E.
- The unit is lux (lx).
Explanation: The luminous flux of 1 lumen is uniformly distributed on a 1 square meter surface.
Definition of Brightness: The luminous intensity of the light source on the unit projected area in the specified direction, the load is L, and the unit is nit ( nit ).
Explanation: Brightness refers to the brightness of a surface, that is, the luminous flux coming out or reflected from a surface, and different objects have different reflection coefficients (or absorption coefficients). The brightness of white and black paper is very different to the human eye. The reflection coefficient of white paper is 80%, while the reflection coefficient of black paper is only 3%.
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