I think the photographer achieved this picture by being out at night when it’s dark, using long exposure, and a tripod. Keeping a low ISO is also essential in achieving this look. Some kind of lighting source appears to have produced the light, possibly a light wand or glow stick. I find this photo eye-catching because the subject is visible and is moving prettily. The light makes a nice swirl around her, making her stand out, and compliments the background of the photo.