You can get a shadow/keep sake type clear box at Joann's or hobby lobby put a batteries light or drill small hole and use one with light with plug. This will works. You can make box (side and bottom) out of scrap wood and have a piece of acrylic cut at hardware for the top and put any size light you need in it. There are many cheep way to make "light boxes" that will work. I use my window most of time to trace, but some times need to sit down or it is night out. I like to do thing as cheep as possible because I an retired and have little money to spend. The more money I can save on stuff like this, The more money I have to buy fabric.