Please make sure the lights are being placed under DIRECT sunlight without any obstructions from the trees or any shades.
-Make sure they are getting plenty of sunlight during the day.
-Please know that these lights are very dependent on the sunlight. So if the weather is inconsistent – raining, snowing, cloudy – these may affect the performance of the light.
-Try to clean the solar panel as the dirt might also prevent solar charging.
-Check if there is any other light close to the Solar Spotlight since there is a sensor built into the panel, when there is light too close to Solar Spotlight, it won't turn on.