LAB PARTS 20 Pcs LDR Light Dependent Resistor Photo Resistor Variable Resistor  (0.1 ohm, 1 kilo ohm ±5%)

An LDR (Light Dependent Resistor) or a photoresistor is a component with a (variable) resistance that varies depending on the amount of light it receives. It is essentially a resistor whose resistance lowers as the light intensity increases. This optoelectronic component is commonly found in light-varying sensor circuits and light- and dark-activated switching circuits. The package contains 20 Pcs. x 5mm LDR (Light Dependent Resistors).