Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice Bright light for a book light!

To be honest, I haven't used it for a book. I use it in our car for our little girl in a car seat. She can see her toys in the dark or snacks we give her. It doesn't bother the driver but she is very well lit up in the back! LOVE IT and have bought 2 and will buy another one day.