Neo LED While cool white (CCT 6000K) is the most preferred for corporate offices and retail applications, neutral white (CCT 4000K) is also well accepted for the same. Show-rooms, Malls, Retail outlets also prefer to use soothing warm white (CCT 3000K) for giving a “GLAMOROUS LOOK” to the ambience. Warehouses, storage areas are recommended to use cool white (CCT 6000K).