Light at the side, slightly behind, shielded so the lights only falls on the glass.
step 3 of 4
The lights are hung about 50cm in front of the black background, to separate them from the background. the room was also a lot darker than you see here.
step 4 of 4
Open you lens up as far as you can, I shot the image at 2.8 ans 1sec. with a 9mm lens.
I had cut a heart out of a piece of black card.
It's really good if you can attach it to the lens, but I had trouble doing that, so just held it in front of the lens.