The normal time of the lamp is 3-7 days. If the product is defective, we will replace it with a good product. Please contact us by email within 7 days of delivery for initial failure replacement period. The **period is 4 months from the date of delivery. If the lamp runs out until 4 months after day 7, we will replace it free of charge. Please understand that the following cases will not be covered by the **(if there are no damage or damage due to incorrect repair or modification, fallen after purchasing, failed or damaged due to water link, fire, earthquake, water damage, thundering, or other accidents or damage caused by astronomic disorders, or delivery data is not provided.)