Kruithof Curve

mainThis is more of a continuation of my blog post on color temperature. Back when fluorescent light sources first came up, they changed the way humans thought about light and color rendering. A scientist named Arie Andries Kruithof performed some experiments on how the human eye relates the amount of light in a given time of day to the color temperature of the light source, and came up with a theory. As we move through the day, the amount of light we get keeps varying. Typically, human beings like higher color temperature light sources during the daytime hours, and lower color temperature sources once the sun goes down. People in warmer climates tend to favor cooler color temperature sources, and people in colder climates like warmer light. So what does this have to do with the Kruithof curve?   Continue reading

What Is Color Temperature?

mainWait a minute, isn’t “temperature” associated with weather? How can color have temperature? The thing is that color temperature is actually a characteristic of visible light that has several important applications in photography, publishing, and many other fields. We actually see and feel it all the time, it’s just that we don’t realize that we like certain color temperatures more than others. The concept of color is more easily apparent to us. We can see what’s red and what’s blue. There are a lot of characteristics of color that we feel, but don’t realize. So what exactly is color temperature?   Continue reading