LED street lights installed on both sides of the road, horizontal installation and angle installation (0~30 degrees), natural convection heat dissipation, that good heat dissipation.
The angle of heat dissipation is good, because the general hot air will spread upward, and the slope is more convenient for the diffusion of hot gas.
Generally speaking, this is a better angle installation, and the light source installed vertically below is the best,In fluid mechanics, the density of hot air is smaller than that of cold air, small density, light mass of hot air rises, cold air sinks, and natural convection occurs. But it doesn't have to be angled, depending on the shape of your fin design and the way it is cooled.
There is a good angle to install, hot and cold air quality is heavy, there is an angle easier to form air convection
