What are the main parameters of LED lights?
The important aspects of the optical parameters of LEDs are: luminous flux, luminous efficiency, luminous intensity, luminous intensity distribution, and wavelength.
Luminous efficiency is the ratio of luminous flux to electric power, and the unit is generally lm/W. Luminous efficiency represents the energy-saving characteristics of the light source. This is an important indicator to measure the performance of modern light sources.
The luminous intensity of an LED characterizes its luminous intensity in a certain direction. Since the light intensity of LED differs a lot at different spatial angles, we then studied the light intensity distribution characteristics of LED. This parameter is of great practical significance and directly affects the minimum viewing angle of the LED display device. Moreover, traffic sign lights also require a larger range of people to be able to recognize.
For the spectral characteristics of the LED, we mainly see whether its monochromaticity is good. And pay attention to whether the main colors of red, yellow, blue, green, and white LEDs are pure. Because in many occasions, such as traffic lights, the color requirements are stricter. However, it is observed that in some LED signal lights in China, the green is blue, and the red is deep red. From this phenomenon, it is very necessary and meaningful for us to conduct special research on the spectral characteristics of LEDs.
