My ceiling is completely flat approximately 12 ft by 14 ft I would like to do a day/night scene on my ceiling I don't know how to light it. I know how to paint the day and night affects. I don't know how the light it so that when I switch from ambient light for the day to UV light for the night. How do I get a good even wash of UV light across the ceiling. I don't how to arrange the lights. do does anybody know or can anybody help me with how to light a ceiling with UV light?