Here are 3 tips for lighting different scenes: 1. For an internal scene use a key light as your main, a backlight to separate subject from background, and a fill light to lighten shadows. 2. For an external scene use available sunlight and supplement with reflectors. Choose a location with good existing light and face your subject towards the light source. 3. For night shoots use available moonlight or streetlights. Consider noise increase and use natural or considerable artificial sources like streetlights. Platforms can provide shadows.