How to do light painting photography?

In order to get more creative effects, we can make more changes in light sources and filters. For example, the author uses fireworks as the light source, and can also use lighter light, candle light, flashlight light and fiber light. Various filters can be used, such as starlight lens, annular soft-focus lens, water-drop soft-focus lens, fog lens and local soft-focus lens, and various colors, such as yellow, purple, orange, yellow-green, green, light blue, blue, light red and deep red.

Light-painted photography usually adopts an all-black background or obtains a long exposure time in a dark place (of course, grey mirror can also be added), which makes the painted case more vivid and prominent, but it can also be taken at dusk, so that light-painted works combining environmental lighting effects and scenery will have a unique style.

If I spend 15 seconds of exposure time, and a person shakes the light at will, the light is very bright, and CCD people will be more sensitive to this bright light source. At about 10 seconds, people will walk away. In this way, only the image of light will be left on the CCD, and it will be a drag, but the person who shakes the light will not leave any shadow.