These Mighty Bright Ultrathin Lights are great for reading by. They’re small, come in fun colours, can double up as an emergency torch and my children – who share a room – love them because they can stay up in bed reading (or looking at the pictures) without disturbing the other child if one is ready for sleep and the other isn’t.
The lights fold flat and are really light and small (think tiny mobile phone size) but have a hinge to clip onto your book cover and a poseable light.
They cost about £9/£10 each. I got mine from the dreaded Amazon.