What are the advantages of zoom flashlight compared with non-zoom flashlight?

A zoom flashlight is usually equipped with a lens, and the aperture can be made larger or smaller by changing the distance between the lens and the LED. It is the prototype of LED spotlight. Corey's LED is convex, the astigmatism is large aperture, and the light is very uniform. Non-zoom flashlights generally use a lamp cup, which concentrates the light in the middle and is circular. Each has its own advantages, depending on where it is used. I feel that zoom flashlight should be more practical. The long-term effect is good.