I love all things solar powered and was so excited about these. I brought them to the family beach house this summer. I had left them out for two full, sunny days before going and all day the first day we were there. On our first night we were all sitting out on the balcony and so happy to have them, but they only lasted three hours, just under two hours the next night. By the third night they were turning off after a minute or two and I had to turn them off then on again for them to last another minute or two. This was the best part of the summer sun-wise, barely a cloud in sight on these days and they were outside charging in direct sunlight all day every day before using them at night. I was so disappointed. I want to send them back, but no longer have the boxes they came in. I should have tested them properly before throwing the boxes out.