The size of the light spot can be adjusted telescopically, and the irradiation range can be adjusted according to the needs of use. The size of the light spot can be adjusted telescopically, and the irradiation range can be adjusted according to the needs of use. Straight appearance, telescopic focusing design, with anti dropping tail rope, convenient and multipurpose, can be operated with one hand. IPX54 grade waterproof can be used for a series of life waterproofing such as rain, humidity, short term water entry, etc., not for diving. UV curing, night catching scorpions, cabinets and other plate anti counterfeiting label detection, fluorescent agent detection, paper currency appreciation anticounterfeiting, oil stain detection; also widely used dust and fiber industry, etc.