In terms of light, the luminous intensity of LEDs is indeed much stronger than that of high-pressure sodium lamps. It can illuminate more places and make the field of vision wide, but this strong white light is not perfect. If you use such street lamps in the city, With the help of advertising light boxes, neon lights and shop lighting, it doesn't feel very tired. If you are on a very empty loop, the visual fatigue will be magnified infinitely. This is what we usually say in white light.
In contrast, the yellow warm high pressure sodium lamp does not cause this phenomenon, which is why the high pressure sodium lamp is not completely replaced.
