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5600K = "True Daylight" color temp., in photography. A 'bluer, crisper, brighter' light.

Higher numbers = A 'brighter feel", since they have more blues and whites.

Lower numbers = A "softer...

We have a double vanity, with 2 lights above each. 150W CF, 5600K in each. I like as close to daylight on the color spektrum in areas that I want bright clear lighting.