As suggested by
yelvertoft and
Andy, here’s the shooting arrangement.
As I’ve posted
here this is a very basic setup.
LED torch was used like brush to paint with light. One side at a time.
One needs to be really careful about camera shake and movement. This may look like a small area but you need walk around from left to right and you need to really plan your steps and movements.
Setup area was roughly 5/5feet in size. Exposure time was roughly 40sec.
DEMO.jpg
Sorry about this drawing quality. It's a fast one with Illustrator and Photoshop.
Waiting for Don’s input here too.