After opening the box, carefully check whether the lamp is damaged by transportation, such as whether the screw is loose, whether the lens is broken or not. Please check before powering up. Check that the lamp is placed correctly and securely, and check that the power supply voltage in the same as the product. This equipment is a Class 1 protection device, so the ground wire of the power supply must be grounded and completed by a professional. Check that the power supply voltage is normal before use