Szukana fraza: [Abstrakt = "The article presents results of theoretical analysis performed using computer simulations based on the finite element method. The study involved analysis of propagation of optical radiation emitted by multiple LEDs installed in a lighting device. The study considered calculation and analysis of optical radiation propagation in the structure of a lamp and its surroundings. Based on the achieved results, the source and amount of losses of optical radiation that is absorbed by the lamps structure elements were determined."]

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