Professional terminology for LED lighting projects
Published Time:
2021-08-04
As a lighting professional, it's essential to understand some basic knowledge of urban lighting projects. So, how much do you know about the terminology of LED lighting projects?
As a lighting professional, it's essential to understand the basics of urban lighting projects. So, how much do you know about LED lighting project terminology?
Terminology
Illumination efficiency (Lm/W) = Luminous flux (Lm) / Power consumption (W)
Luminous flux per unit solid angle per unit area. Unit: nt (cd/m2) Article "2015 LED Lighting Engineering Terminology
Luminous intensity (I): The luminous flux emitted by a light source within a unit solid angle in a specified direction. Unit: Candela (cd)
Luminous flux (Φ): The total amount of light emitted per second by a light source, i.e., the amount of light emitted. Unit: Lumen (Lm)
Illuminance (E): The luminous flux emitted by a light source onto a unit area of the illuminated object. Unit: Lux (Lm/m2)
Luminance (L): The luminous flux emitted by a light source in a specific direction, you know 5.html
Average life (h): The number of hours until 50% of a batch of bulbs fail to light up.
Color rendering index (Ra): Compared to daylight, the degree to which a light source renders the colors of objects is called color rendering, which is the degree of realism of the lighting color.
Coefficient of utilization (CU): The ratio of the luminous flux received on the work plane to the total luminous flux of the light source.
Economic life (h): Considering both bulb failure and luminous flux decay, the number of hours when the integrated luminous flux is reduced to a specific percentage. This percentage is 70% for outdoor light sources and 80% for indoor light sources such as fluorescent lamps.
Maintenance factor (MF): The maintenance factor K is defined as the ratio of the average illuminance (i.e., maintained illuminance) produced on the work plane after a period of operation to the average illuminance (i.e., initial illuminance) when the system is newly installed.
Correlated color temperature (K): Expressed in absolute temperature K (Kelvin), a standard black body is heated, and when the temperature rises to a certain level, the color changes from red to light red, to orange-yellow, to white, to bluish-white, to blue. Using this characteristic of color change, when the color of a light source is the same as the color of a black body at a certain temperature, we call the absolute temperature of the black body at that time the correlated color temperature of the light source.
Glare: When there are objects with extremely high brightness or strong brightness contrast in the field of vision, it can cause visual discomfort, which is called glare. Glare can be divided into disability glare and discomfort glare, and glare is an important factor affecting the quality of urban lighting projects.
EasyPass Reminder: When choosing SMT pick-and-place machine equipment, be sure to choose a capable enterprise. Shenzhen EasyPass Automation Equipment Co., Ltd. is a professional SMT pick-and-place machine equipment manufacturer, specializing in the research and development and manufacturing of SMT pick-and-place machine equipment. Products are exported to many countries overseas.
EasyPass HT-F7 High-Speed Pick-and-Place Machine
Product Features:
1. Suitable for one-time mounting of 0.6, 0.9, and 1.2-meter LED rigid light boards, and 0.5 and 1-meter LED soft light strips.
2. The mounting heads are divided into left and right groups, each group with 17 suction nozzles. A and B materials can be mounted simultaneously, single-plate materials can be mounted separately, and the same plate material is always mounted on the same light strip.
3. Four types of materials can be mounted simultaneously, and the production capacity is not affected by the proportion of LED beads and resistors.
4. Exclusive patented technology: group picking and group placing
No. 739, Zhou Shi Road, Hezhou Community, Hangcheng Street, Baoan District, Shenzhen
Copyright © 2025 Shenzhen ETON Automation Equipment Co., Ltd. ALL Rights Reserve.