Who needs an expensive light box? Maybe someone doing very precision work. If you need to transfer a pattern onto paper, then make sure you are working in the reverse of the direction you want your work to face (real quilters will understand that statement). Attach the original to window with tape. Then tape paper over the pattern and outline. Use parchment paper so you can iron directly onto the paper. You can also use an applique pressing sheet to lay out and iron on all your fabric pieces for your work.
Next tip: go to your hardware store and get sticky backed sandpaper. The original use is for on an orbital sander. Cut pieces off and stick to the backs of your rulers to avoid slippage when cutting out material. It is especially useful on the Table Topper class we just taught at our quilt group, Northeast Quilting Friends.