These crafts light up when you sprinkle them with a spoonful of water. They are water diyas just like oil and ghee mitti diyas. It look like natural wax based floating Candles / Diyas They provide a warm orange light when water is dropped on them evoking the classic atmosphere of an oil Diya. Because they are battery-operated these deeps / candles are lightweight and reusable. These candles are made of high quality plastic material provides warm white light when illuminating.