HQRP Waterproof Color Changing LED Lights may be submersed into floral arrangements, centerpieces, ponds, indoor or outdoor fountains, fish bowl, punch bowls, vases, bowl, ice bucket, fountain, or any water filled container. They may be used with or without water. This HQRP Multicolor Submersible LED lights are perfect for special event, light shows, illuminated water in the pool, pile clear gems and jewels on top for a lovely mood lighting effect, floral arrangements, art projects, design props. They are fun and safe when you need an alternative for candles in order to meet fire codes or to avoid the dangers of an open flame. Submersible Multi-Color LED Lights are ready to use. They are about 1.125 inches in diameter by about 1.00 inch high, and therefore fit standard Tea Light Holders. To activate your Little Light LEDs, twist the top clockwise. Multicolor Submersible LED Little Lights will help make your a party reception a night to remember.