UV protection UV lamp which is widely used in PCB factories, microelectronics factories, printing plants, etc. all use photolithography and chemical etching methods to print small circuits on specific substrates. The glue used for etching is sensitive to ultraviolet or visible light below 420mm. If the white lamp tube containing ultraviolet rays is used for illumination, the result is that the edge of the fine circuit etched by the circuit board is blurred, thereby seriously reducing the quality of the PCB or the quality of the printing plate. Therefore, you must use a yellow light safety lamp. Yellow light safety lamp can suppress ultraviolet rays below 500nm, and it is suitable for use in electronics factory yellow light District, PCB factory buildings, microelectronics factories, and exposure rooms.