About LED lighting engineering professional language
As a lighting person, you must understand some basic common sense of urban lighting engineering. Then, how much do you know about the terminology of LED lighting engineering?
Efficiency of lighting source (Lm/W)=Luminous flux (Lm)/Power consumption (W)
The luminous flux per unit solid angle per unit area. Unit: nt(cd/m2) article "Terms of LED Lighting Project in 2015
Light intensity (I): The luminous flux emitted by the luminous body within a unit solid angle in a specified direction. Unit: Candela (cd)
Luminous flux (Ф): The total amount of light emitted by the luminous body per second, that is, the amount of light emitted. Unit: Lumen (Lm)
Illuminance (E): The luminous flux of the luminous body illuminating the unit area of the illuminated object. Unit: Lux (Lm/m2)
Luminance (L): The luminous body is in a specific direction, you know 5.html
Average life (h): refers to the number of hours when a batch of light bulbs are lit until 50% of the number of bulbs are damaged.
Color rendering (Ra): Compared with sunlight, the degree to which the light source presents the color of an object is called color rendering, which is the degree of vividness of the lighting color.
Utilization factor (CU): The ratio of the luminous flux received on the working surface to the total luminous flux of the light source.
Economic life (h): Considering 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.
Maintenance factor (MF): The definition of maintenance factor K is: after a period of work, the average illuminance generated by the lighting system on the working surface (ie, the maintenance illuminance) and the average illuminance when the system is newly installed (ie, the initial illuminance) Ratio.
Color temperature (K): It 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, and Blue-white, blue, and gradually change. Using this characteristic of light color change, 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 .
Glare: There are extremely bright objects or strong brightness contrast in the field of view, which can cause visual discomfort and is 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.
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Yitong HT-F7 high-speed placement machine
1. Suitable for one-time mounting of 0.6, 0.9, 1.2 meter LED hard light board, 0.5, 1 meter LED soft light strip mounting
2. The placement head is divided into two groups on the left and right, each with 17 nozzles, A and B materials can be pasted at the same time, a single reel can be pasted, and the same reel is always mounted on the same light bar.
3. 4 kinds of materials can be mounted at the same time, and the production capacity is not affected by the ratio of lamp bead resistance.
4. Exclusive patented technology: group picking and group posting
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