What is a Lightworker?

Someone called me a Lightworker a few days ago.  It was very flattering, even though I don't really know what it means.  It just sounds nice:  Lightworker.  I get an image of someone who takes light and uses it to create something new ... kind of like a woodworker, but with light.

When I hear the word, Lightworker, I conjure up images of Leo the Whitelighter in Charmed.  Whitelighters can orb, which is a way of travelling instantly from one place to another in a sparkly white light.  They also have tremendous healing powers.  If I were to choose superpowers, these would be two very cool superpowers to have.  But I'm pretty sure when that person called me a Lightworker, this is not what they had in mind.