As the color temperature increases to 3000K - 3500K the color of the light appears less yellow and more white.
2700k vs 3500k. When it comes to the overall 1000K-10000K Kelvin scale theres not much difference between 2700K and 3000K. 90 CRI indicates the red peak is at 630nm. LH351D - 2700K vs 3500K.
The difference between 2700 and 3000 is pretty small but you dont need to standardize either. My rule of thumb is to go with 3000k in active areas like kitchen living room hallways etc and 2700k in relaxed areas like bedroom and dining room. Generally a warmer color temp is desirable similar to halogen which is closer to the scale of 2700k-3500k.
As the color temperature increases to 3000K - 3500K the color of the light appears less yellow and more white. 3500K is still warmish and non-institutional without all the color distortion and other problems warmer lighting causes. My previous office use 3500k T5 while current office use 5000k LED.
If we compare 3000K vs 2700K the lower value will be more yellowish that is the 2700K The Warm white color is best for family rooms bedrooms and living rooms. Providing a traditional warm cozy feel to them or any room that requires an intimate and personal mood. Let him put in 3500K and youll probably get used it in short order.
The cooler whiter colors seem brighter and can be used where bright lighting is. Kelvin affects ratio between red and blue peaks but doesnt indicate ratio of reddeep red. 2700k is only around.
Consider an incandescent light bulb. 3500K Use this color for general household and office lighting where soft lighting is not desired. If we compare 3000K vs 2700K the lower value will be more yellowish that is the 2700K The Warm white color is best for family rooms bedrooms and living rooms.

