I have an idea of making interactive flowers with the light. I am more designer than electric engineer so I need your help in building it.
A friend told that photodiode could be used to give electric impulses from the light. But I have no clue about the rest. Any reading, part, tutorial information regarding it would be much appreciated.
Meanwhile I am posting my explanation of where I am heading to:
In video from 00:21
and some of my drawings: