What are the lighting engineering terms?
by：EME LIGHTING
2021-03-22
The lighting engineering industry has developed to this day. It has long been a time when a few people can take over the project. The lighting engineering company has strict qualification requirements, designers have high creative requirements, and construction personnel have rigid technical requirements. For a qualified lighting engineering personnel, some basic common sense and professional terms must be understood. Today, the editor will count the commonly used lighting engineering terms:
1, light intensity (I)
The luminous flux emitted by a luminous body within a unit solid angle in a specified direction. Unit: Candela (cd)
2, luminous flux (Ф)
The total amount of light emitted by the luminous body per second is the amount of light emitted. Unit: Lumen (Lm)
3, Illumination (E)
The luminous flux illuminating the unit area of u200bu200bthe illuminated object. Unit: Lux (Lm/m2)
4, brightness (L)
The luminous flux per unit solid angle per unit area of u200bu200bthe luminous body in a specific direction. Unit: nt(cd/m2)
5. Average life (h)
refers to the number of hours when a batch of bulbs are lit until 50% of the bulbs are damaged.
6, color rendering (Ra)
Compared with daylight, the degree to which the light source presents the color of the object is called color rendering, which is the degree of vividness of the lighting color.
7, utilization factor (CU)
We take the ratio of the luminous flux received on the working surface to the total luminous flux of the light source.
8. Economic life (h)
Taking into account the damage of the bulb and the attenuation of the beam output, the integrated beam output is reduced to a specific ratio of hours. This ratio refers to 70% of outdoor light sources, and 80% for indoor light sources such as fluorescent lighting.
9. Maintenance factor (MF)
The definition of maintenance coefficient K is: after a period of work, the ratio of the average illuminance generated by the lighting system on the work surface (ie, the maintenance illuminance) to the average illuminance (ie, the initial illuminance) when the system is newly installed.
10, color temperature (K)
is expressed by the absolute temperature K (Kelvin), which is to heat a standard black body. When the temperature rises to a certain level, the color starts to change from red to light red, orange, white, blue and white, and blue When the light color of a light source is the same as the light color of a black body at a certain temperature, we call the absolute temperature of the black body at that time as the color temperature of the light source.
11, glare
There are extremely bright objects or strong brightness contrast in the field of view, which can cause visual discomfort called glare. Glare can be divided into disabling glare and uncomfortable glare. Glare is an important factor that affects the quality of urban lighting projects.
Finally, the lighting project party A pays more attention to a light effect, the term is the efficiency of the lighting source, the conversion formula is: the efficiency of the lighting source (Lm/W) u003d luminous flux (Lm) / power consumption (W).
Compare and see how much do you know?
1, light intensity (I)
The luminous flux emitted by a luminous body within a unit solid angle in a specified direction. Unit: Candela (cd)
2, luminous flux (Ф)
The total amount of light emitted by the luminous body per second is the amount of light emitted. Unit: Lumen (Lm)
3, Illumination (E)
The luminous flux illuminating the unit area of u200bu200bthe illuminated object. Unit: Lux (Lm/m2)
4, brightness (L)
The luminous flux per unit solid angle per unit area of u200bu200bthe luminous body in a specific direction. Unit: nt(cd/m2)
5. Average life (h)
refers to the number of hours when a batch of bulbs are lit until 50% of the bulbs are damaged.
6, color rendering (Ra)
Compared with daylight, the degree to which the light source presents the color of the object is called color rendering, which is the degree of vividness of the lighting color.
7, utilization factor (CU)
We take the ratio of the luminous flux received on the working surface to the total luminous flux of the light source.
8. Economic life (h)
Taking into account the damage of the bulb and the attenuation of the beam output, the integrated beam output is reduced to a specific ratio of hours. This ratio refers to 70% of outdoor light sources, and 80% for indoor light sources such as fluorescent lighting.
9. Maintenance factor (MF)
The definition of maintenance coefficient K is: after a period of work, the ratio of the average illuminance generated by the lighting system on the work surface (ie, the maintenance illuminance) to the average illuminance (ie, the initial illuminance) when the system is newly installed.
10, color temperature (K)
is expressed by the absolute temperature K (Kelvin), which is to heat a standard black body. When the temperature rises to a certain level, the color starts to change from red to light red, orange, white, blue and white, and blue When the light color of a light source is the same as the light color of a black body at a certain temperature, we call the absolute temperature of the black body at that time as the color temperature of the light source.
11, glare
There are extremely bright objects or strong brightness contrast in the field of view, which can cause visual discomfort called glare. Glare can be divided into disabling glare and uncomfortable glare. Glare is an important factor that affects the quality of urban lighting projects.
Finally, the lighting project party A pays more attention to a light effect, the term is the efficiency of the lighting source, the conversion formula is: the efficiency of the lighting source (Lm/W) u003d luminous flux (Lm) / power consumption (W).
Compare and see how much do you know?
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