The basis for correlated colour temperature or in short CCT comparison is the sun. CCT expressed in Kelvin Scale (K) is used as a method of describing how warm or cool a light source appears to be to the human eye.

When we talk about color temperature we are referring to the warmth or coolness of light sources. Light sources that appear warmer and yellowish have a low colour temperature (2000K-3500K) while light sources that appear colder and more bluish have a high colour temperature (4000K-6500K)

Light not only has the power to change the ambiance of a space, but it also affects our wellbeing and our biological clock. While perceptions of color are vast and perceived differently by each of us, there are some color effects that have universal meaning.

The color appearance of a light source is a factor that must be carefully considered.

Warm lights make the environment feel more welcoming and relaxing. Cooler lights make the environment more stimulating - vibrant, refreshing. It makes you feel more alert and focused. Consideration of the materials used within the space is also a key as illuminating a warm wooden surface with a cool light source will reduce the lustre of the space.

Prior to choosing the color temperature of a lamp the questions to ask yourself: WHERE? For WHAT purpose? WHEN? WHAT time of the day will i use it most? WHY? WHAT ambiance am I trying to create? Relaxed and Cozy? Dynamic? Vibrant? Maintain focus and stay alert?

Light Pollution is the inappropriate, misdirected, excessive, widespread use of artificial light, which results in serious environmental consequences for humans, wildlife and our climate. Overly lit areas cause Light obtrusion, Glare, Sky glow, Light clutter which eventually harms living beings.

Glare is a general term for the reduction of visual performance or the disturbance of perception, as caused by high luminance or contrasts in luminance within a visual environment. A distinction is made between physiological glare, in which there is an objective reduction of visual performance, and psychological glare, where perception is subjectively disturbed due to a disparity between the luminance and the information content of the area viewed.