Why do the light bulbs in the jewelry studio use warm lights?

Incandescent lamp is not a warm color lamp, and its color rendering index is 65,438+000%, which is very beneficial to accurately restore the color of the object. However, fluorescent lamp or led with warm color only has a color rendering index of 70 ~ 85%, and the objects photographed are color-cast, so it is not necessary to photograph warm jewelry, so incandescent lamp can be used.