About a year ago I purchased an LED light pad thru Amazon. The brand was "Lite Energy" it is very thin and measures 26 x 19 1/2. I think I paid about $125. For it. It is used regularly and I haven't had any problems with it.
I made a quilted bag for it ( with batting and all) so I can slide it in and keep it in decent shape out of the way of dust and dirt. I highly recommend it. The light pad has 2 light settings.