I looked at cases with built-in booklights, and just didn't like them as much as other cases. Now I have three cases that I use for different purposes, none of them lighted.

I bought a tiny, separate booklight with a clip and a bendable neck, and it works well enough when I need one. Most of the time, I just use my bedside lamp when I need a light. I generally only use the booklight if I'm reading in the dead of night and don't want to disturb moosl.

I do find, by the way, that I need less illumination for the Nook than I do for dead tree books. The e-ink is easier on my eyes.