Here is a video review for Litup LP3 light box in inking. It is thin and bright. It is easy to see through watercolor paper and several papers. Drawing can be easy and fast.
http://www.amazon.com/dp/B00OCKI1JG/ref=twister_B00RFC1THY?_encoding=UTF8&psc=1
https://www.youtube.com/watch?v=I5ms7kbfyp0
