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Technical equipment used to simulate sunlight and daylight. Daylight can either be simulated by the hemispherical arrangement of numerous luminaires or by the multiple reflection of a luminous ceiling in a room fitted with mirrors. Sunlight is simulated by a parabolic mirror whose movement can reproduce the sun´s path during the day or the year for any latitude. A daylight simulator allows the relationship between light and shadow in proposed buildings to be simulated on a model, including testing the various lighting control elements and measuring the daylight factors on the model.