Sadly, these lights were absolutely terrible. They worked for about 3 days. I thought maybe it was the fact that we were trying to use them in the winter, when there wasn't much light to charge them up, so I left them in the sun for 3 more days (turned off, so that they wouldn't use up the energy overnight) but still nothing. Last ditch effort, in the summertime, I charged them in the sun all day and tried to use them for a party in the evening. Two hours into the party they were completely out.
They were a complete waste of money.