Marble studio lights need to sow marble, granite and other precious stones in its true color. 97 CRI lights are best recommended to show the bright colors, as would be seen in true sunlight. 5000 Kelvin shows color similar to morning 8-9 am mild warm yellow color, which is most appeasing. Higher lux levels of 1000-2000 can create a sense of dramatic luxury, and catalyze the purchase decision.