I would check into LED strip lighting through GM Lighting.

Hi Prusell,

I know this is kind of late, but we carry some flexible strip lighting that would work very well with your art. They are thin and light-weight... very easy to hide! They also plug right into a standard outlet, so there's no need for an electrician.

Normal bright flex strips would give it a nice glow! We also offer strips in colors if you want to mix it up a bit!

http://www.inspiredled.com/products/lights%20and%20accessories