Vivasvan is a term that is used to describe a person who
is passionate about something.
Vivasvan or "shining out" is a phrase that is used to describe anything that is bright or luminous.
In the Hindu Pantheon, it is Surya's (Sun) epithet.
Take a look at Surya for more information.
You may also want to read more about Hinduism here.
Be sure to check out my writings on religion here.