sensor - Light Dependent Resistor Photoresistor LDR: gl5516 vs gl5506

What is the difference between gl5516 and gl5506? (in a SIMPLE way)

Answer

The GL5506 has a significantly lower resistance for a given amount of light compared to the GL5516 AND, in dark conditions the resistance of the GL5516 is significantly higher in resistance (as you would expect). Now go look for the data sheets and read them.