From the twinkling lights on automobiles and aircrafts, to the splendid views of night city landscapes and illuminated homes, LED lighting technology has been widely adopted in the past years. This was followed, however, by the “light pollution” issue that affects the vision.
Recently, Fudan University revealed that after five years, its research team had launched an evaluation model for the discomfort glare of LED light. Effective in detecting and reducing the magnitude of light pollution, the model had been successfully adopted for the country’s large aircrafts R&D initiative.
The technology had also been documented in the technical file of the International Commission on Illumination, offering reference standards for the industry globally.
Light glare is not unfamiliar to us in daily life. It is caused by imbalanced distribution of luminance within vision field, or an extreme contrast of light intensity among spaces or time continuities, resulting in visual discomfort and poor visibility condition for objects, according to Lin Yandan, Fudan’s research team member and Associate Professor at Department of Illumination Engineering & Light Source.
Compared to traditional light source, LED light has a small concentrated area of radiance and elevated surface brightness, therefore possesses a higher probability of producing discomfort glare. As a result, the evaluation and control methods of the LED glare had become research hotspots.