They are gorgeous, but I debate brilliance. Pretty much any introductory class to photography covers "light painting" - long exposure, fixed subject, movable light source.
(I don't say this to distract from the artistry, just to point out it's a well-known technique, and halos are on the more common side when painting with light)
(I don't say this to distract from the artistry, just to point out it's a well-known technique, and halos are on the more common side when painting with light)