What is light color, color rendering, lamp efficiency

What is light color, color rendering, and lamp efficiency? Light color is actually color temperature, which can be roughly divided into three categories: warm color K　Because of the difference in the composition of the light spectrum, even if the light color is the same, The color rendering of light may also be different. In principle, artificial light should be the same as natural light, and the naked eye can correctly distinguish the color of things. Of course, this depends on the location and purpose of the lighting. The degree to which the light source presents the color of the object becomes the color rendering, which is usually called 'color rendering index' (Ra). Lamp efficiency. Lamp efficiency (also called light output coefficient) is an important criterion for measuring the energy efficiency of lamps. The ratio of the luminous flux output by the light source in the lamp. The light color is actually the color temperature, which can be roughly divided into three categories: warm color K　. The color rendering property may also be different. In principle, artificial light should be the same as natural light, and the naked eye can correctly distinguish the color of things. Of course, this depends on the location and purpose of the lighting. The degree to which the light source presents the color of the object becomes the color rendering, which is usually called 'color rendering index' (Ra). Lamp efficiency. Lamp efficiency (also called light output coefficient) is an important criterion for measuring the energy efficiency of lamps. The ratio of the luminous flux output by the light source in the lamp. The light color is actually the color temperature, which can be roughly divided into three categories: warm color K　. The color rendering property may also be different. In principle, artificial light should be the same as natural light, and the naked eye can correctly distinguish the color of things. Of course, this depends on the location and purpose of the lighting. The degree to which the light source presents the color of the object becomes the color rendering, which is usually called 'color rendering index' (Ra). Lamp efficiency. Lamp efficiency (also called light output coefficient) is an important criterion for measuring the energy efficiency of lamps. The ratio between the luminous flux output by the light source in the luminaire