Community supported agriculture is an alternative food system based on a cooperation between farmers and consumers who socially interact in a community. It was settled in the USA and spread all over the world while changing and evolving its form, although it is a grassroots movement grown from the anthroposofical background in the Europe. A couple of years ago it came to the Czech Republic and now it seeks its own individuality and circumstances which support its livelihood. Which criteria are crucial for thriving CSA in Czech is a key point of this paper.

The paper summarizes the basic light-technical parameters, the principles of visual and non-visual photoreceptions and the effects of light on the organism. Several chapters focus on the mechanism by which light affects hormone levels and the circadian rhytm of the organism. In relation to the lighting system, the impact of electromagnetic radiation, associated with the controls, on the body is also considered. Briefly described are systems based on smart LED light sources or smart switches. The result of the thesis is to choose the solution that best suits the requirements of the contracting authority.