Waterproof Wedding Submersible / Underwater Battery Sub Lights LED 10 Lights~Pink~Wedding~Tea Light Included FREE 2 extra batteries with each order. Waterproof Wedding Underwater Battery Submersible Lights Bright Light for Arrangements. Batteries are 2 per light-#CR2032 Lasts 12-16 hours. Use over and over again, do not twist to tight it could break the rubber seal. 1" tall and 1 1/4" across