|Day Light only - but not direct sunlight - south facing room - sunny day - near a window.
You have to be careful if you are using daylight to light up your set. Firstly do not use direct sunlight i.e. a shaft of sunlight coming in the window. Because it will rarely be constant, moving across the sky will change its intensity and shadows from clouds etc. will result in varying light on your set. This will result in a disastrous effect when you play your frames back. It will really lose the illusion you are trying to create.
If you do use daylight then be really careful !