Wall lamps and pillar lights bear most of the visual performance in outdoor lighting plans, but they are also the two types of products most commonly selected for "just looking at the appearance". Functional questions must be answered first: how to correspond to the height and spacing of the column lights, and how much light is allowed to cast upward from the wall lamp.

Pillar lights have a simple working rule. 600 mm is a "marker"-defines the boundary of the road surface and illuminates the feet. 800 mm starts to really light up a corridor. 1000 mm is enough to spread out a larger area and is a common choice on the edge of lanes and squares. In order to form a continuous light band, the spacing is approximately 3 - 4 times the height; no matter how wide it is, the entire set of lights will read as isolated spots of light rather than a continuous moving line.

The key distinction between wall lamps is "only illuminated" or "illuminated up and down". Models that shine only or have light-blocking leave light in useful areas on the ground, avoiding the upward light-and due to light pollution, many European cities now restrict upward light. The top-down model is still suitable for facades and landscape walls, where the upward light is itself the design intention.

These two types of products are open to the air all year round, so at least IP54 is used for sheltered locations, and IP65 is used for facing the sea or completely uncovered walls; at the same time, check the surface treatment specifications-it should be powder spraying suitable for outdoor exposure, not indoor grade paint.