On a whim, I asked my mother to get me a book light for Christmas, and I thought this one looked interesting. It has now become one of my medically-necessary items! Not only can I read comfortably from anywhere in my dimly-lit house, including propped up on pillows in bed, but I can wear it around the house when my hands are occupied and I can't carry a flashlight. It'll come in quite handy on those days when I need the rollator or even just carrying laundry into the cellar.
It's not heavy on the neck, the arms are nicely flexible, and the light is bright. Each arm has a separate button and 3 levels of brightness, so you can adjust it to suit your needs. The charger is identical to the one I use for my phone, and the initial charge took under 3 hours. I've now used it for 1-2 hours a day since Christmas and haven't needed to recharge it yet. Once I figure out how long the charge actually lasts, I plan to buy another one or two for myself and one for each member of my family. They also come in a variety of colors, if that matters to you.