I saw this short conceptual piece in my intro to film studies class, a year ago and it is an interesting film, the only problem being that it is almost impossible to find it.
The film is an 8 minute reflection on the use of light as a art and as a semantic tool that infuses meaning by creating a mood... This structural deconstruction focusing on one of the elements of mise en scene is an instructive didactic work that aims at teaching the viewer to scrutinize the images presented to him.
The only thing on the screen here is a lemon and the entire action of the film is a progressive change of the lighting on it. Once you get over the concept you can actually enjoy a nice little film funny and touching at times, it sounds strange but really that goes to prove the power of lighting as an essential and pervasive tool for the filmmaker.
I recommend to see this film to any committed film student if you can put your hands on it.