Lighting problems in photography

This matter is quite complicated. We won't know until we actually test it.

The nature of light, if it is flash, the sun and a special filament (which can't be typed out), may be different.

The biggest influence is the white balance of the camera itself. Different white balance choices have different results.

It is related to the texture of the cloth. If the cloth reflects blue light weakly and absorbs green light much, there is no way to evaluate it directly.

Your method is only applicable to experiments in 3D rendering software. In real life, more experiments are needed to achieve good results.

But generally speaking, blue light will be weaker.

If the light properties are the same. Basically, it can be called addition. The effect of turning on one light at home is obviously different from that of turning on more lights.

In addition, we also need to consider the distance of the light source and the angle of illumination. This also has a great influence on the amount of light entering.