MAY DAY Solar Powered 6 LEDs Waterproof Spotlight Garden/Pool/Outdoor Spot Light Lamp Underwater Light Continuously light over 8 hours if it is charged 8 hours by the enough sunlight. The degree of Waterproof protection is IP68 Prevent the dust from going into the light and it can be put in the water for a long time. Product lifespan: more than 1 year. Rechargeable Battery: 1 * Ni-MH AA type, 1.2V/600mAh