A handy clip-on reading light, small and lightweight enough to slip inside your bag or pocket. Carry on reading anywhere, even when the sun goes down. Perfectly travel practical for a relaxing holiday or simply on the commute home. And it takes a standard AAA battery – easy to find and change wherever you are! The Really Serious Book Light Range is a co-ordinated collection of reading lights designed to suit the needs of all kinds of book light users.