I recently was as an Engineer working for a company that makes commercial lighting. We offer our light fixtures with a range of color temperatures from 2700K to 6000K. It all depends what you are trying to light and the ambience you are trying to achieve. To summarize Higher numbers more blue/whiter, Lower numbers more yellow/orange. For more accurate "color rendering" you generally want higher numbers. But your eye can be fooled by how colors are they are lit.
One definite no-no is mixing color temperatures, unless you are trying to achieve different effects. For instance have seen large layouts that depict different seasons. Winter/use high K (white), Fall use low K (orange). The different lights can be used to accentuate the colors, on the layout, similar to the way filters were placed over the camera lens back in the day for lets say, sunset photography.
Also the screw-in LED bulbs have made Huge strides in the last few years. Keep in mind that there will be color shift as they age, but incandescent bulbs also did that.
Lastly dimming LED bulbs does NOT cause color shift, although your eye may not see it that way. Dimming Incandescent definitely did cause color shift (as they were dimmed the filament color actually changed). Don't to stare at one to see! Or at LEDs. I don't want to be sued for causing anyone to go blind. LOL - Jim
