Lighting is for visual beauty. That kind of ecological cylinder is used more. For goldfish, pride is sunshine, because the beauty of goldfish is not only the shape, but also the color. To ensure bright colors, it is necessary to ensure that the fish body receives strong light, otherwise, the color of the fish body will become more and more dim. Moreover, it is easy to get sick, so the goldfish feeding place should have sufficient light sources, especially ultraviolet light sources.

If the temperature is suitable, you can put the fish tank on the balcony or in front of the window during the day to ensure sufficient light. Therefore, mastering the temperature suitable for goldfish growth and ensuring its sufficient illumination is a great guarantee for keeping goldfish indoors.

Sunlight is a kind of composite light. White light is also composed of light with multiple frequencies. Sunlight also includes visible light and invisible light. Invisible light also contains some ultraviolet light, and infrared light is seen by lighting engineers. Different lamps, such as incandescent lamp, sodium lamp and fluorescent lamp, emit light with different frequencies, but they are all visible light. But don't be exposed to the sun.