Samyo Set of 36 Waterproof Wedding Submersible Battery LED Tea Lights Underwater Sub Lights- Wedding Centerpieces Party Decorate (White) Very suitable for Wedding Centerpieces, Party Decorate, Birthday or any other Celebrations at night. Creates a warm ambiance without flame ,wax smoke or mess to clean. Waterproof. you can put it in a Pool of water, fishtanks, anywhere you want to light up. Provide up to about 40 hours of continuous lighting. Can be reuseable just change batteries. Twist the light for easy on/off. Replaceable Batteries 2 per light-#CR2032.