A photometric model for predicting the sky glow of greenhouses
conference paper
many greenhouses use artificial light to grow plants. Part of this light escapes, scatters in the sky and causes sky glow. Residents in the vicinity complain about the absence of natural darkness. A light scatter model is developed in order to quantify the dose of the sky glow. The luminance of the sky glow and the illuminance due to the air glow was calculated for various greenhouse parameters, distance to the greenhouse, and meteorological visibility. These results were compared with measured values in the field. The model predicts the measured values quite well. The worst case situation (largest dose) occurs when the meteorological visibility is 3.5 times the distance. For this condition the light dose is almost inversely proportional to the square of the
distance. The model is applicable for other types of light emitting objects (public lighting, advertising, etc.) and an extension is planned for cloudy skies.
distance. The model is applicable for other types of light emitting objects (public lighting, advertising, etc.) and an extension is planned for cloudy skies.
TNO Identifier
16502
Source title
Proceedings of conference Urban Nightscape 2006, Thission, Greece: Hellenic Illumination Committee
Pages
208 - 210
Files
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