automatic light intensity controlling using arduino and BPW34

Hi Iam varjith, i would like to do a small project , i wonna automatically adjust the light intensity in a room using the windows and lights in the system. like if the light intensity in the room is less automatically windows will open and even after windows are opened if the light intensity is less. then automatically the light is switched on. for this i am going to use the BPW34 photodiode. but i dont know how much voltage the sensor produce for a perticular intensity, and i too dont know how to connect the sensor with the arduino becuase as it produce variable voltage( means for the coding section)

here is a chart but, is there any predefined charts about how much voltage will it produce for a perticular light intensity