1. One of the two lamp tubes of the inspection table falls off and has poor contact, resulting in the light intensity of the inspection table not meeting the standard;2. The inspector has a shallow awareness of the standard of the light source, finds that the lamp tube is not on, and fails to suspend the use and report abnormalities in time;3. The spot inspection frequency of light source is 3 months / time, and the phenomenon that the light source does not meet the standard is not detected in time.