I bought a light box for myself a couple of weeks ago because I noticed the ink work on my markered pages is utter BALLS. See, I used to draw the image in really light pencils so they could be erased later. However, since I couldn't see my own pencil work, this yielded some royally shitty ink work.
And then came the lightbox.
I did my latest deviation (domo-kun) by doing a rough pencil page and lightbox inking it. IT'S AMAZING. The difference is like night and day. Guys, if you do ink work or marker work, save your ducats and get a lightbox. For reals. I tell you because I love you.