Hi all. I've been reading postings on edgelit signs until I'm just about blue in the face I've finally (I think) sourced my materials, but have a couple of questions: Is a 12" high cast acrylic panel too high? It looks like most folks are sticking to about half that height. Also, (and this may sound really stupid) how are they getting the really dark background? Are they just turning the lights off when the picture is taken, or perhaps putting a black film on the reverse side? Thanks!kitten edgelit.jpg