What is the knowledge of the installation distance of garden lights?

At present, there are many kinds of garden lights coming out, but what is the distance for installation? Real estate development is fast, many times need to illuminate the lamps, then the appearance of garden lights is in line with the development needs of real estate, garden lights are fresh, the height is not high, can well match a variety of styles of the community, many times when installing garden lights will find a problem, how many meters to install a garden light is a reasonable distribution? Let's answer each of them one by one, hoping for your help.
First of all: indirectly there is a mask, this kind of its light is not scattered everywhere because sodium lamps and metal halide lamps can be used 150W distance is 16 meters away OK, can pull up the garden light is 45W electric drill tube energy-saving lamp, luminous flux up to 2300lm above, color temperature normal selection of 2700K, The height of the lamp is 3.5m, the color rendering index is natural enough to reach Ra=80, the distance of the main park road is 18m, and the secondary garden road is arranged to be 20m.
Then: the road is mastered in two ways in the form of distance jump, and the lights are turned off halfway after noon to waste power. According to the theory of fortifications, the dark band between the two lamps is exactly xx, which means that the arrangement distance is fundamentally appropriate. If the height of the pole changes, the arrangement distance is adjusted slightly.