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Definition of lighting terms

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luminous flux

Light intensity

Special number: medium Unit: lumen) Unit symbol: lm The sum of the energy emitted by the light source and received by the human eye is the light encounter (medium)

illuminance

Light effect

Temperature

Color rendering

Light distribution curves

Symbol: 1 Unit: Candela (Candela} Unit Symbol: cd[1cd=1lm/sr) Generally speaking, light rays are emitted in different directions and with varying intensities. The intensity of visible light emitted at a specific angle of direction is called light intensity (1)

Symbol: E unit; Lux Unit Symbol: Ix(1lx=1lmmmIlluminance refers to the luminous flux of luminous luminaire on the unit area of the illuminated object

Symbol: L Unit: Nitu Unit Symbol: cd/m2 Brightness refers to the luminous flux of a luminous object within the unit area of a solid angle in a particular direction.

Symbol: m Unit: lumens/watt Unit symbol: Im/NW Luminous efficiency refers to the ability of electrical energy to be converted into light energy, expressed as the luminous flux emitted divided by the amount of electricity consumed.

Unit: Kelvin (K) Chromatic proliferation is the most common indicator to indicate the spectral quality of a light source, and is generally expressed by Tc. The color temperature is defined by the absolute black body, and when the radiation of the light source is exactly the same as the blessing of the absolute black body in the visible region, the temperature of the black body is called the color temperature of the light source.

Color rendering refers to the characteristics of different colors when light sources of different spectrums shine on objects of the same color. The color rendering index (Ra) is usually used to express the color rendering of a light source. The light source with high color rendering reproduces the color better, and the color we see is closer to the natural primary color, and the light source with low color rendering has a poor color reproduction, and the color deviation we see is also larger.

It refers to the distribution of light intensity of a light source (or luminaire) in all directions of space. Representation of light distribution curve: There are generally three representations of light distribution curves: one is the polar coordinate method, the other is the right-angle barrier method, and the third is the equal light intensity curve.

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Guangdong Xigang Lighting Technology Co., Ltd

Address: 3rd Floor, Building B, No. 3, Qingfeng Road, Maohui Industrial Zone, Henglan Town, Zhongshan City

Phone: +86-0760-87689830

Fax: +86-0760-87689831

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