AGPTEK 12PCS Battery Operated Waterproof LED Flickering Flameless Tealight Candles for Wedding Birthday Party Floral Christmas Decoration - Warm White These Floating LED Lights light up in contact with the water. They adopt replaceable batteries (CR2032) and are ready to use out of the box. These reusable, floating LED lights, are waterproof and flameless and are thus perfect for lighting up vases, bowls, or any water filled containers. These Floating Candle lights are often used for event design. They make great party favors as well.