What is lumen?
Lumen is a measure of the total quantity of visible light emitted by a source per unit of time.
What is Kelvin?
Kelvin is a messure of the colour temperature. Color temperatures over 5000 K are called “cool colors” (bluish), while lower color temperatures (2700–3000 K) are called “warm colors” (yellowish).
What is CRI?
CRI (color rendering index) is a measure of how accurately a light source illuminates objects’ true colors. LED lights have CRI values of up to 98, indicating that they are able to produce white light that approximates halogen or incandescent lighting and natural daylight.