Hopeless romantics know how a bathtub filled with candles can turn the situation in their favor quickly, and the Happy Aqua Lumi is an updated version of that idea featuring water-resistant, battery operated illuminating LEDs. A trio of AA batteries are all that is required to light the Happy Aqua Lumi up. You can choose from the rainbow mode or timer mode, where the latter will treat you to 10 minutes’ worth of lights that blink every 10 seconds. Battery life stands at 96 hours before replacements are required. Choose from blue, green, and red colors for $39 a pop.