This is a guide of screenshots I took from the Citadel after you kill truth and stitched together for a quick reference. I know Ascendant Justice did this before but I took more straight-on shots and then reduced the glare in photoshop so that they show up clearer. I numbered them on the assumption that 01 is closest to the elevator and 07 is closest to where Truth activated the rings.
You can view them larger with the magnifying glass icon. From there you can hit view all sizes and hit original for the full resolution.
Guide showing all of them at once.
http://www.flickr.com/photos/mastergeorge/6300746922/in/set-72157627899071029
A few shots of individual installations because they looked pretty:
Installation 03:
http://www.flickr.com/photos/mastergeorge/6300212597/in/set-72157627899071029
http://www.flickr.com/photos/mastergeorge/6300746668/in/set-72157627899071029/
Installation 05:
http://www.flickr.com/photos/mastergeorge/6300212957/in/set-72157627899071029/