I purchased my light box from Hobby Lobby. Works great for me.

What are you going to use it for- I took a class from craftsy on whole cloth quilts with Cindy and in her class she used a light box to trace stencil onto fabric and she recommended http://www.mesew.com/

I bought mine from Nancy's Notions, pricy but I love it, it is very bright, I can see through really dark ( even black fabrics for appliqué placement. To me it was worth the investment. Her website & catalog have a couple different sizes , the box style & the flat Panels

I love all the creative suggestions!
Another option instead of tracing on the background fabric is to trace on clear plastic document savers sheets (I cut them apart so there is only one layer). Trace your entire pattern. I am still working on the "My Cats Garden" and the panels are large with hundreds of pieces. It took four document saver sheets for the center panel. With the traced plastic on top of the background, slide the applique piece under the plastic and position. This is especially helpful when the pieces lay over each other instead of on the background fabric. You still have to trace the design on the applique piece, either with a light box or around the cut out template.

Great idea, Fay. My version is to use the heaviest clear plastic table covering (Walmart or Joann's), cut to whatever size is convenient, to draw your design with a permanent marker. Tape the top corners to your design table. Lift it up from the bottom edge and layer your project underneath, beginning with the background fabric. Very portable!!! No need for special lighting. Sorry that I can't remember the name of the teacher in Frederick County, Maryland, who taught us this super easy method more than 20 years ago.

I have had this one for several years.
https://www.google.com/#tbm=shop&q=l...91935442286119

but sure did not pay that for it. It was less then $50 but even at that time most were close to $100.

I do not see why it is so expensive. Even $50 seemed a lot but I was desperate.

The 12x18 size is great.

The slant is not necessarily desirable and I end up having to use some painter's tape to tape pattern sheets down.

Have you considered Craigs List?