How to make circular light on the background in photography

I don't know if your so-called round lamp is a dot or just a big disc like a professional advertisement.

This is a round lamp with a professional advertising background.

This is the scene.

Both round lamps need certain equipment. Let me talk about the necessary equipment and methods respectively.

Speckle type

This is the simplest, just need a large aperture lens. When taking pictures, the subject is far away from the background and has a large aperture, so you can take pictures.

Light of advertisement

This is actually very simple to do.

Equipment: flash (the kind in the studio), flash, standard cover or inclined background cover.

After adjustment, it can come out as soon as it is placed in the background of the object.