It is very important to choose the LED lights with right beam angle. Imagine that you walk into a dimly lit space, how you will feel about that? It is very sure that you will never want to go there again. One main reason for that is the wrong beam angle of LED lights used.
The beam angle shows the light of LED lights is concentrated or open, which is one of the key parameters of LED lights. Different application areas need the LED lights with different beam angle. Some angle as follow:

For example, when lighting a tall building from the floor, narrow beam angle LED lights will be needed:

And to illuminate a room, big beam angle, such as 90° or 120° can cover more areas and will give more uniform lighting.