I purchased the lights for my back yard where half the day they are shaded by a few trees in my back yard so I'd say they receive four to six hours of direct sunlight. This has been sufficient sun light to charge the batteries and keep the lights on all night long on the dimmer setting. The bright setting is too bright for my liking and the color temperature is too white/bright for my liking. The lights would make good flood lights if perched on a post or soffit. I do like the stakes that come with the kit as it is easy to move out of the way while mowing the lawn.