Pre-owned in new unused condition. Water activated lights. I tested one and they work. On first use,flowers may require a few seconds in water to activate. Warm water or rubbing the contact may be required. Distilled water will not activate flowers. Batteries will last for 120 hours but not continuously. Built in battery ensures no leakage.Set of 8. Perfect for ponds,pools, hot tubs,bathtubs, gardens,centerpieces parties and decorating.