Hi everybody,
At the beginning of summer I have my final High School exam and I have to bring a project. I want to do a device that calculate the luminous intensity and send it wireless to another device wired to a lamp and the lamp should light in accordance to the brightness just sent.
I know that need something like a photodiode, but I'm not very good in electronic theory, so if you can give me some advice it could be great!
Thank you all 
so if you can give me some advice it could be great!
Get one and try it.
some inspiration - rafaeltorrales.info - This website is for sale! - rafaeltorrales Resources and Information. - no arduino code
Check the tutorial pages of analogRead()
I've just been playing with this, to great success - using a LED as the sensor! I used a fairly large white one I had lying around.