In the world of flashlights and headlamps we mostly see Kelvin as the unit used to describe the colour temperature of a light source. But how can a temperature scale be used to describe if light appears blue, white, or yellow?
The explanation for this might seem a bit scientifically complicated, but we will try to explain it as simple as possible.
In the world of physics, the object “blackbody” is an ideal theoretical object that absorbs all radiant energy, including light. Therefore, a blackbody will appear completely black, at least at room temperature. In theory, when heating up a blackbody it will start emitting a light visible to the human eye. When the temperature rises, the colour of the light emitted from the blackbody changes from red and yellow to white and blue.
Therefore, the colour temperature of a certain colour is defined by how much heat, in Kelvin, it takes for the blackbody to reach that certain colour.
Flashlights and headlamps usually range from 4000K which is a warm yellow light, to 8000K which is a cool blue light. At Suprabeam we use LED chips with 7000 Kelvin, which gives an extremely clear and crisp white light. There is one exception to this, the Q1 True Color, which is fitted with an LED chip with 5000K a warmer color temperature closer to daylight, which helps the penlight reproduce colors more accurately.