This is how I made a simple LED light box.

There are hundreds of instructions around on how to make light boxes (aka, tracing light boxes, animation boxes, etc.) . . . from quick-and-dirty versions, to fairly technical versions.

This one falls somewhere in the middle. It is solidly-built with minimal cost and has some features I really like:

durable plywood case
tempered glass top
perfectly diffused, uniform LED lighting
handle
no soldering required to make; just needs an unmodified LED strip glued inside
doubles as a party light, mood light, strobe light, etc.

The main cost was an rgb LED strip which cost about $20. The rest of the materials were things I had on hand, or that I picked up for next to nothing. If you want to make yourself a nice little light box, perhaps you'll consider this design.

Thanks for taking a look!

Step 1: Materials

I wanted to use a piece of tempered glass for the top rather than any kind of plastic. I kept my eyes open and eventually found two 14" x 14" panes of tempered glass at a thrift store for $.50 each. That was a good find!

I used one of these panes of glass for this light box. If I had not found these, my next option was to use the pane of glass out of an old printer/scanner.

Other than the glass, here's what I used:

plywood (I used 15mm birch ply)
flexible LED strip
1/4" vinyl-faced mdf
sheet of dollar-store foamboard (Adams brand--the kind with translucent paper)
woodworking tools
wood glue, hot glue, other miscellaneous general supplies

Step 2: Box Sides

I made my box sides 6" tall.

Using a router mounted in a table, I cut rabbets (or "rebates" for my UK friends) along the top edge to hold the glass, and along the bottom edge to hold the mdf panel.

The length of the sides were made as needed to fit my specific pane of glass, with two opposing sides having rabbets cut on the ends to add just a little strength to the corner joints.

Step 3: Dry Fit

The box sides were dry fit to check that the glass would fit correctly. In my case, I had to cut the top rabbets just a little deeper to provide enough clearance for the pane of glass.

Better to have to fix that now, than after the box was assembled!

Step 4: Paint Inner Walls

The inside walls were painted with a few coats of white spray paint.

Step 5: Assemble Box

The box was assembled with wood glue and brads. The brad holes were filled with putty and sanded smooth once they were dry.

The box was sprayed with a few coats of spray lacquer, and a handle was fastened to one side.

Step 6: Glue in Glass

I used E-6000 to glue the pane of glass into the recess on the top of the box.

I squeezed a small bead of the glue all around the inside corner of recessed cut, and simply dropped the pane of glass in place. I left this to cure for about a day, and when I came back it was firmly fixed in place.

Step 7: Foamboard to Diffuse Light

I toyed around with a few options for the step.

In the end, cheap foamboard provided what I thought was the simplest and best way to evenly diffuse the light. Make sure you use the kind of foamboard with thin, translucent paper. (Some foamboard has thicker opaque paper, and that stuff will definitely not work.)

A piece of foamboard was cut to fit perfectly against the inside of the glass.

The inner glass was cleaned thoroughly, and the board was pressed into place. It was a snug fit, so the piece of foamboard is not going to budge.

Step 8: Add Light Power Boxes

For the lighting, I also toyed around with a few options.

I had a SEKOND cord set from Ikea that I was tempted to use along with an LED bulb, but it did not cast the light as evenly as I preferred.

So instead I went with this strip of sticky-backed rgb LEDs, which worked beautifully. I love the fact that the color and brightness are fully adjustable, and if I'm in the mood I can trace to my heart's content to a pulsing strobe light.

Holes were drilled in the side of the box for the power cable and IR receiver. The power boxes and cables were hot glued in place along the base of the box walls (what will be the down-side when the box is right-side-up).