These solar powered lights that fit the top of mason jars are great. You can build anything in a jar and be able to add lights without batteries or cords. The pannle on top of the lid absorbs light durring the day and the sensor in the lid turns the lights on and off depending on the amount of light that hits it. No light the string turns on. Sun comes up and light hits the lid and the string powers off. #Rankboosterreview #Sponsored #ERUW https://www.amazon.com/Waterproof-Charged-Environmental-Protection-Lanterns/dp/B073FBWT1P