By using a powerful flash, you are able to keep the ISO low by letting the flash illuminate the subject instead of the camera. This is contrasted with a continuous light because a strobe tends to output a larger volume of targeted light.

Why do photographers use flash instead of continuous light?

Flash is also more powerful than continuous light. A single speedlight puts out more power than most beginner continuous light kits. You can even use them to overpower the sun if you have a big enough strobe. ... They work better than continuous lights for action shots.

What is the difference between continuous lighting and flash lighting?

Simply put, any form of continuous light is just that. It is 'always on,' as opposed to flash, which delivers a quick burst of light only when triggered. In photography terms, light that is already present in a scene is referred to as 'existing' or, more often, 'ambient.