Physician Niels Ryberg Finsen was keenly interested in the effect of light on animals and himself. That prompted him to study light therapy using concentrated sunlight. 

In 1903, Niels Ryberg Finsen was the first Dane to be awarded the Nobel Prize in Medicine and Physiology.

With the advent of antibiotics, people almost forgot about using light to deactivate bacteria and viruses.

Today Farmer-Light uses as specially developed LED chip to deactivate harmful microorganisms and promote the formation of natural vitamin D3in human and livestock plasma.