What does 4000K mean?
4000k refers to the CCT (Correlated Colour Temperature) that describes the colour appearance of a white light source in Kelvins.
Colour temperature is a description of the warmth or coolness of a light source. When a piece of metal is heated, the colour of light it emits will change. This colour begins as red in appearance and graduates to orange, yellow, white, and then blue-white to deeper colours of blue. The temperature of this metal is measured in degrees Kelvin or absolute temperature. We utilize the correlated colour temperature (or Kelvins) to describe the appearance of that light source as it relates to the appearance of the piece of metal
The pros of 4000K light?
For a short time during the day, at noon, when the sun is the brightest, the light is about +6000k. A human eye is designed to protect itself during this time of day because of the high level of UV light. There is more than enough light to see therefore the eyes react by reducing their aperture – they limit how much light they let in. This is not the reaction that you want at night. To improve the response and focus time more light needs to enter the eye, not less.
Most people will say that a cold white (+6000k) looks brighter than a warm white light and this is true. It does “appear” brighter but it is not. The result is that the eye has difficultly to focus due to the reduced amount of light entering the eye. Also the blue sensitive cones are not in the middle of the retina, which makes focusing on blue objects difficult.
As a result, 4000k light does not appear bright/harsh to the eyes and your eyes do not limit the amount of light they let in – making it easier to see.
Check out our great range of 4000K LED lights, at unbeatable prices.Google+