In the field of LED street lights, both the customer and the manufacturer are two very important indicators for color temperature and light decay. Especially in the field of LED street light contract energy management, the color temperature of LED street lights has very high requirements for the application field, and light decay is a key indicator to ensure the life of LED street lights.
you need to understand the two concepts of color temperature and light decay.
1. LED street light color temperature
The color temperature of LED street lights is expressed in K, which is to heat a standard black body (such as platinum). When the light color of the light source is the same as the light color of the black body, we call the temperature of the black body at that time the color temperature of the light source. When the color temperature of the LED street light is about 3000K, the light color is yellowish. When the color temperature is above 5000K, the light color is bluish. Light of different color temperature, with different lighting and visual effects. Different color temperatures correspond to different colors of light.
The following is the performance of different color temperatures: light color temperature light effect: 3000K yellow light, strong penetration; 4200K white with yellow; 5000K—6000K light is completely white; 6500K in the daytime under sunlight; 7000—8000K white with obvious blue; Blu-ray above 8000K has extremely poor penetration.
2. LED street light decay
In layman's terms, light decay refers to the process in which the luminous flux of the LED street light decreases under the influence of its own quality and use conditions.
The main reasons for this problem of LED street light products are as follows: ①The problem of raw material selection for LED street light products: 1. The quality standard used in the selection of LED chips is not good enough, and the quality of LED chips is poor, and the brightness will decay faster. 2. There will be obvious differences in the production process. If the heat dissipation structure is not paid attention to, the heat dissipation of the LED chip will not be quickly exported, resulting in the excessive temperature of the LED chip and aggravated light decay. ② Problems in actual use: LEDs are driven by constant current. If the driving current of LEDs is greater than the rated driving conditions, the long-term overload operation will seriously affect the life of the power supply, thereby affecting the constant current driving of the power supply, which will directly affect the The luminous effect and service life of the light source.
