This one I did alittle differently, I put a black tshirt on top of a box, and put the box behind the insulator and shut off all the lights in my room, I had to put my camera on a tripod so the photo wouldn't blur, I tried several ISO settings, 400, 200, and 100, with a 5.6 Aperture, and shutter speeds of .4, .5, .6, .8, 1.3, and 1.6 secs, I think this one is a 400 ISO with a .8 shutter speed, but I honestly don't remember, I took around 20 different photos of this piece, testing various settings to see what comes out the best, this one was more to highlight the off white color of the glass when underlit more than anything, hence the high exposure.