There are many advantages to shooting in raw format rather than JPG. There are also disadvantages such as the extra storage space, but the positives outweigh the negatives. I am going to focus on one advantage: white balance colour correction.
I do not currently have a light table of my own for doing back lit photos. My daughters however do, sort of. They each got a light table for Christmas as part of a fashion designer kit toy. The light is produced by LEDs under a translucent plastic top. The LEDs are very, very blue. Let's call them almost purple.
I decided to give it a try and here is my first result after correcting the colour and processing. It was cropped slightly and sharpened.
I tried it again and for this I have a before and after:
I use Lightroom for my processing. To correct the white balance I used the eyedropper tool to select an area. The colour temperature gets adjusted up to around 19,000K! It is not perfect, but I could probably work on these a bit more. The next time I use the light table, I am going to try to use a grey card and set a custom white balance in the camera and see how that works.