Choosing the right colour temperature for your room is a matter of taste and is something that you need to make the final decision on. Old halogen lights had an extra warm white 2700K colour temperature, this offers a homely warmer tone but has an orange tinge.
The most popular choice of colour temperature when choose LEDs is warm white 3000K. It has no orange tinge and is clearer than 2700K but not as clinical as cool white 4000K.
Cool white 4000K (also known as neutral white) is much whiter. Some customer choose this but don't always like it as its a very big change from a halogen tone. But used in the right environment it can make a room appear more modern and brighter.
The JCC V50 is a colour temperature adjustable downlight. Fitted with a small switch, you can change the colour temperature from 3000K to 4000K. This can be useful if you don't known which colour temperature you want or if you ever plan to change it in the future. If you really can't decide we recommend purchasing the V50, then you're covered either way.
Our chart below shows the scale of colour temperatures from candlelight to daylight on a clear day:
These images below compare all 3 of the main colour temperatures used in a kitchen:
More information about colour temperatures can be found here.