The height of solar street lights depends on where they are installed. As many solar street lights are for the village, the best height can be 4-6 meters because there are not many pedestrians and vehicles. But if the solar street lights are for the main streets, they need to be over 12 meters high. The higher the street light, the more wattage it needs to be bright enough. Therefore, on the basis of meeting the lighting requirements, shorter street lights can save costs to some extent.
More reading: Height of Street Lights: How Tall Should They Be?