Painting with Light

In my last lesson we learned about how to 'paint with light', which I found incredibly interesting.
These two images are off lostamerica.com and are examples where this has been used to create a very extreme and surreal result:

Above by Troy Paiva, Below by Unknown

Linda Girvin also creates a lovely effect in this image:You can also 'graffiti' with light, as in this photo:
(from http://www.dejavuphotoservices.com/, artist unknown)
I'd like to experiment with these types of lighting because there's so many different directions you could go with them.
Other images I've come across recently....'identity unknown', Linda Girvin

'Under the Illusion', Linda Girvin

Rebecca Walker

(Title and Photographer unknown)