ITEM NAME:20PCS Photoresistor GL5528 LDR Photo Resistors Light-Dependent FT.Illumination resistance characteristics: 3. Dark Resistance (MÃŽ ©): 1. Light Resistance (10Lux) (KÃŽ ©) :10-20. Ambient temperature (℃): -30~+70. Ambient temperature (℃): -30 --- +70. Model: 5528. Spectral peak (nm): 540.