I would like to break a lance: The terminals are actually strong, but you even hold on to the round bar of our metal bed. The beam can be wonderfully set on the book and emits surprisingly little in the total space, so a weary partner (or partners) can sleep in peace.
I read mostly with the Kindle and can can be adjusted just fine that it provides enough light, yet not reflected on the screen.
Furthermore, the lamp looks - especially at this price - very valuable out. A sensible investment for reading in bed.