Different color temperatures have different effects on the human eye.
4000k cool white vs 5000k daylight. 3000K Vs 4000K. Warm White is around 3000k whereas Cool White is around 5000k. Cool white bulbs are known to help with concentration in classrooms and productivity at the work place.
4000K is an often overlooked color temperature as it falls right in between warm white 2700K3000K and daylight white 5000K6500K color options. Cool white bulbs have a Kelvin temperature of 4000K-4200K. The higher the Kelvin value the whiter the light.
It can make a room feel cold and clinical but when used in the right environment it can make a room appear more modern and. 3000K will carry more of a yellow tint to it but still can function nicely within a wide range of applications. 6500K is a very cool white that is used to simulate day light.
5000K is normal for stores office space etc. It is mostly used in kitchens. Cool white bulbs have the appearance of pure white and make a room feel neat clean and efficient.
Cool white appears brighter than warm white meaning its also more energy efficient. The most popular choices are Cool White Daylight and Warm White and these colours are measured in Kelvins. A 5000K LED bulb produces a bright daylight kind of color.
You can even use it in the kitchen when you work. In fact red has the lowest color temperature then gradually increases in orange yellow white and blue blue is the highest color temperature. A 5000K LED bulb produces a bright daylight kind of color.

