This becomes the basic justification of colored lighting in theatre. It would be easy to simulate the sun, and associated shadows, indoors if we had one lighting fixture that could produce the same intensity. Unfortunately, this fixture is not available and we must use multiple fixtures to simulate the same effect. The moon provides a similar source and angle of light, but there are some significant differences. Moonlight is reflected sunlight, it is less intense and does not have the intensity to create the same bounce or fill effect.
Nighttime lighting has much more contrast, or shadows, than daytime lighting.
Three fixtures can adequately illuminate a three-dimensional object on all sides. Though positions can vary, the basic design would include one fixture placed at a 45-degree angle above and 45 degrees to one side. This would be the key light. These three fixtures produce illumination that when viewed by the human eye, is perceived to be similar to that of natural sunlight. The 45-degree angle is not unchangeable, but keep in mind that extreme angles create extreme effects.