Trendmart Bright Led Underwater Submersible Waterproof Floral Decoration Tea Light Candle for Wedding/party/ Xmas Decoration (Pink 12pcs) These waterproof Submersible LED Lights feature an On/Off Switch and are ready to use out of the box and are thus perfect for lighting up vases, bowls, or any water filled containers. They can turn a boring bowl into a beautiful and exciting centerpiece. They are popular to use for wedding, party, decoration, Christmas, birthday etc. Use 2 x CR2032 Submersible Batteries which are included and are already installed. These batteries are replaceable Can be turned on or off by twisting the base of the unit. Submersible,flameless,high safety.