A ring shaped directional [[lamp]] intended to be used with a [[camera]].  They provide even illumination with few shadows visible in the resulting image because the origin of the light is placed very close to, normally around, the camera lens.  Originally designed as a flash for cameras, but with improved energy usage gave way for the development of continuous lights.

h4. External links

* "Wikipedia - Ring flash":[https://en.wikipedia.org/wiki/Ring_flash]
ring light