lamp
I am not sure what is meant by "伍德灯" (Wu De
lamp). However, if we assume it refers to a type of light source that emits a specific color, it is possible that white spots (白斑) may appear white when illuminated by such a light source. This is because the color of an object is perceived by the human eye based on the wavelengths of light that are reflected off the object and received by the retina. If the light source emits light in a wavelength range that reflects off the white spots and enters the eye, then the spots may appear white to the observer.
