We really love these lights. We hang it on the awning of our VW camper van. In the highest setting it provides enough light to read a book in the dark. Just perfect! Right now it sadly doesn't solar charge anymore. Only on usb. I also have the idea it functions a smaller amount of time on a full charge. Personally I think these lights should last for around 5 years when you only use them on your camping holiday. Ours lasted 2 years and are now half-half useable so I think the live span is to short for the money you pay. Kind regards Richard