I took my light camping along the beach. I forgot to charge the light until the last few hours of our day. I propped it up on my car dashboard toward the sun and it charged for about an hour of really not full sun. Wow! After dark I was able to use the light to get some reading done in my old school basic kindle. On the low setting it was so bright I read and I got some cooking done without need of any other light source. (The other brighter settings were also usable.) I didn't use it long that night but the Luci still had enough of a charge that I used it the next day before the sun came up to get dressed and light the way to fix breakfast. Love that it has an on-off switch. Definitely impressed.