That would be William Kelvin who lived in Great Britain in the mid-1800’s. He noticed that the color of heated steel changed as it got hotter. The hotter it got, the more it changed from red to blue. This was the origination of the term “red hot”. He is the Kelvin that the color scale is named for. From 0 to 6500 the scale runs from very red to yellow to white to blue and it measures the “color temperature”. It is important when you consider what lamps or fixtures to use in your particular application. This color temperature range is also referred to in terms of warm to cool.
Why does it matter? Generally, warmer color tones (from 1900-3000 Kelvin) will give you a calmer, more relaxing and comfortable atmosphere and are the best selection for bathrooms, break rooms, living and bedrooms. Mid tones from 3500-4500 Kelvin will give you a more invigorating and work-type of environment for offices and work areas. Cool tones from 5000 Kelvin and above will be very crisp and vibrant and are suitable for retail, manufacturing and inspection areas. Sunny outdoor conditions measure approximately 6500 Kelvin.
So, consider the activities that take place in the areas you are selecting lamps or fixtures for and if you have any question, message, email or give us a call at 231-715-1295 and we will be glad to offer our suggestions.