This project is an application of LDR (Light Dependent Resistor)
we have also used a 2 channel relay to control a bulb which is a high voltage device through arduino
this project can be put into real life appliCations like automatic
street lights...
Step by step instructions and code available on my instructable
https://www.instructables.com/id/Light-Sensitive-Lamp/
plzz subscribe to our channel and support us..