When these lights work, they work very nice. They aren't too bright, so if you want a big light effect, buy a few sets of these. 

They worked great after a full day of sun. When it is very cloudy outside, they will not get a full charge and not light at all. I highly recommend moving the solar panel that comes with it, to the closest sunniest part to where you are putting your lights. There is enough slack to move it around. There are also two buttons under the solar panel: one is to make the lights flicker and one is to turn the lights one and off.