What device is used for imparting healthy glow to skin?

There are several devices that can do that.

First of all - there is a non-invasive personal LED one can use at home which brightens the skin by means of red light frequency and infra red light. A variation on this is a LED with an interchangeable head with different lights which aid the skin in different ways.

Second, there a deep cleaning brush with a rotating head powered by ultrasonic waves which stimulates skin rejuvenation.

There's a devices that uses microcurrents for toning the skin and brightening it in the process. Plus there's a device powered by radio frequency that utilizes the warming effects to enhance collagen growth, which also results in brighter skin.