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.
Pane Amore e Cha Cha Cha 
Ooh, they look good. Am wondering if they would be good for bedtime reading when camping… Will have to check them out.
I bought one first to check them out. The only minus is that, depending on the size of the book, they do illuminate one page better than another. For camping I’m wondering if a head torch might not be a better buy?
https://paneamoreechachacha.com/2012/11/21/head-torches/
I have one of these, though a slightly different version. http://www.bookdepository.co.uk/Mighty-Bright-Pur-Xflex-2-Lght-Mighty-Bright/9781933622736
The neck is flexible so you can adjust it to shine on both pages at once or one at a time. Have not had it long but I am quite pleased with it
I saw those! And they also have double headed ones. Glad to hear it’s good Emily thank you.