Okay so I just gave mine away and want to offer a note of caution.
If you have any bit of chest at all, it may not be the best solution. This is not to assume you are a woman, but as a woman, I can tell you that my breasts got in the way and blocked the light. I found it pretty tough to get the light into a position where it actually shined on my work. I would characterize my size as fairly moderate—not small, but not huge either.
I mentioned it to a friend and she said, “Oh, I wouldn’t have that problem” (haha) so as soon as I found it in my unused stuff, it was passed on!