Lamps are indispensable products in life, which are needed everywhere in life, study and work. LED lamps are also the most widely used type of lamps in daily life. Among them, no stroboscopic or low-frequency flicker rate is a very important assessment factor. Therefore, various countries have included stroboscopic items in the scope of regulations and standards. For example: GB/T 9473-2017 Performance requirements for reading and writing work desk lamps; Energy Star in the United States; European ERP; British ERP, etc.