The lights are very good quality. I live in the sunshine state (Florida) and the lights charge up and light up for dust to dawn. Battery life I can not speak to as I have only had the lights for a week. I have installed the lights on my boat dock.
ProsDust to dawn lights
Great reflectors for the dock at night for boaters
ConsReplacement of batteries will require removal of the screws securing them to the dock.
Best UsesBoat docks or decking
Picture below shows the lights on the dock on the left still bright at morning dawn!