Szukana fraza: [Abstrakt = "Greenhouses are objects in which, without the proper protection of the walls and the ceiling, as a result of the escape of the luminous flux, a large amount of light is lost forever. In addition, in the case of glass surfaces of the greenhouse, ensuring adequate lighting conditions for plant growth requires the use of more luminaires, causing the same increase in energy consumption for lighting purposes, and thus lower energy efficiency of lighting and higher costs. The paper presents the results of measurements of illuminance distribution in the interior and luminance on the external surfaces of the greenhouses placed in Wielkopolska. In addition, the results of calculation of changes in lighting parameters are presented after the use of special curtains limiting light emissions outside the greenhouse. The assessment of the energy efficiency improvement of the lighting installation in the greenhouse was carried out."]

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