3. Color rendering advantages:
The color rendering index (Ra) of high pressure sodium lamp is only 23~25, which results in very poor color rendering performance; while the color rendering of LED street lamp can reach Ra70~80, which results in very good color rendering performance. From a visual psychological point of view, to achieve the same brightness, the illumination of high-color LED street lights can be reduced on average than that of low-color high-pressure sodium lamps (refer to UK road lighting standards).
