We warrants to customer that each lights will be free from defects in material and workmanship under normal use in accordance with the user manual provided by WEYUAN. Generally, we offer one year warranty for all the OT lights and exam lights, the warranties can be extend to three or five years based on each customer’s preference. When the warranty period is expired, failure or damage caused by improper and careless moving, services will be charged at reasonable cost and it should be born by the user.