Three point lighting refers to key lighting, fill lighting, and back lighting used in film production. Key lighting is the brightest light that aims at the main subject. Fill lighting reduces shadows created by the key light. Back lighting separates the subject from the background. There are different types of lighting like high key lighting which uses more fill light and creates brighter images, and low key lighting which uses less fill light and creates darker images with more shadows. Lighting techniques like backlighting, top lighting, and under lighting can be used to draw attention to certain objects or characters and create different moods like fear.