Review on Transform Your Holiday Party With Creatrek'S Submersible LED Lights: Waterproof, Battery-Operated, And Perfect For Hot Tubs, Backyards And Pumpkins! by Allan Ryser

I purchased 32 of these and did some testing. With one color on I got well over 24 hours of bright light. On one set of batteries (good quality) we ran a purple color for a Christmas dance for 5 hours. Then with the same batteries the following week did another 5 hour Christmas dance with no signs of the lights dimming. They were also under water during the time used with no issues. Note, the lights in the back ground along the walls are not these tea lights. The light from these tea lights were great for the table decorations we did, but not near bright enough to light a room. The remote control made it great to turn the lights off and on without having to reach into the decoration. Side note. Each 4 pack comes with 4 remotes, one remote works all lights even from other 4 packs. Except I had one set of lights (purchase at a different time) that had a different style remote. It would only turn on the 4 lights it came with and the lights would only work with that remote. So if you get a bunch of these make sure the remotes all match, if not you'll have to remember which remote goes with which lights. We thought we had 4 bad lights until we figured out we had the wrong remote for those lights. So overall these 32 lights all worked and did a perfect job for what we needed. No failures at all, and very happy with the end results.