What is the closest thing to the speed of light in man-made objects?

The closest thing to the speed of light in man-made objects is artificial light. Artificial light has been widely used in our lives.

Artificial light plays a key role in indoor photography. When shooting or using existing light outdoors, the light is ready-made, and you only need to consider how to use it. When shooting indoors, you have to determine the type of light source and the method of light distribution at the beginning. Floodlights and flashlights are two basic artificial light sources to choose from.

Spotlight:

A spotlight can project a highly directional beam. It can produce bright highlights and bright lines and dark shadows. With just a few spotlights, you can create dramatic effects that mobilize people. But in most cases, people always use floodlights and spotlights comprehensively, which can not only ensure the overall light distribution is soft, but also make the outline of the strong light area clear, clear and bright.

Floodlights:

Compared with spotlights, floodlights emit a wider beam, the brightness of high-light areas is slightly weaker, the definition of shadow areas is slightly lower, and the color tone is not too dark.

When you shoot portraits or still lifes in the studio, it is usually more satisfying to use floodlights than rigid and intense spotlights. Therefore, floodlight becomes the main equipment for indoor photography, and spotlight is the supplement of floodlight.