What is the spacing for highway lighting?

What is the distance between two highway lighting? If they are too close to each other, the illumination area overlaps. And if they are too far away from each other, there is a dark area between them. I need an answer.

Different countries have different standards for street lighting, and there are many factors affecting the spacing. Normally, the spacing is 50-100 meters. For some special areas, such as curves, ramps, bridges, or places with heavy traffic, the spacing may be shorter for brighter light. The visibility at night can also affect the spacing of street lights.

More reading: Standards about Street Lighting

What Others Are Asking

Why does LED street light illuminate smaller areas?

The old orange street lights near my house have been replaced with LED ones recently. But I found that the LED street lights illuminate smaller areas. Shouldn’t they illuminate a bigger area than the old ones?

Why is my dimmable LED street light so dim?

I bought a 150-watt LED street light, but whenever I turn it on, it dims down a lot. There isn’t a controller for the light. What are the possible reasons?

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