What is the Kelvin Scale?

The Kelvin Scale measures the temperature of white light.  For example, as detailed below, a lower Kelvin temperature indicates a warmer white - a higher Kelvin temperature, indicates a cooler white. 

Here at Leading L.E.D, we supply the following Kelvin temperatures: 
3000K - warm white 
4000K - natural white 
6000K & 6500k - cool white