What is lamp color (color temperature) and Color Rendering Index (CRI)?
The color of light is determined by its wavelength. The range of wavelengths that comprise visible light make up only a small portion of the entire electromagnetic spectrum. The entire electromagnetic spectrum represents all of the different wave lengths, including radio waves, micro waves to infrared, visible light, ultra-violet light, x-rays and finally gamma rays. White light contains all the colors of the visible spectrum. Two ratings are commonly used to describe the color properties of lamps: 1) Color temperature is the color appearance of the light produced by a lamp and the color appearance of the lamp itself. It is measured with the Kelvin scale (K). A lamp with a low color temperature will have a “warm” appearance (e.g. 2700K called warm white). Conversely, a lamp with a high color temperature will have a “cool” appearance (e.g. 4200K called cool white; 6400K as daylight). 2) Color Rendition is a measure of how the lamp influences the color appearance of the objects which are
