This tutorial shows how to use the Arduino Uno and a photo resistor (photocell) to control a LED light and a servo motor. Below you can find the links to the schematic and code, the photo resistor I used in the video and the servo motor I used in the video.
If you have any questions, Arduino or other tech related questions, Please feel free to ask. I will do my best to see to it that you get the answer and that you understand that answer.