Features RESPONSE TIME: With a response time of 20ms in bright light and 30ms in dark light, this photoresistor ensures quick and accurate light sensing. PACK OF 50: The set includes 50pcs of 5mm GM5539 photoresistors, featuring a leg length of 31mm, providing ample supply for your projects. 20 LIGHT SENSORS: The photo light sensitive resistor has 20 light sensors, ensuring stable and reliable light measurement. SEMICONDUCTOR MATERIAL: The photoresistor is made of semiconductor material, with its conductivity varying with changes in light strength. WIDE APPLICATION: The light dependent resistor is widely use in our daily lives, including photoelectric control, automatic exposure in cameras, indoor lighting control, alarm systems and more. Specification: Item Type: Photoresistor Material: Sedimentary Film Model: GM5539 Maximum Voltage: 150V DC Maximum Wattage: 100mW Spectral Peak: 540nm Light Resistance (10Lx): 50-100Kohm Working Temperature: -30℃ to +70℃ Size: Approx. 5mm/0.2in Leg Length: Approx. 31mm/1.2in Package List:50 x Photoresistor Package List 50 x Photoresistor