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The present study evaluated levels of zenith daylight and the incidence of solar radiation in an indoor environment with two-sided roof monitor system opening using a parametric geometric model, numerical simulations and machine learning techniques. It was used a climatic database from a locality with a hot and humid tropical climate, at low latitude in Brazil. The daylight performance was analyzed using the Useful Daylight Illuminances and the incident solar radiation with annual and daily maximum results. The study included analyzes with the zenith openings oriented to North-South and East-West, considering the photosensitive sensor meshes on the walls and floor. The results presented that the modeling process used can help the architectural design process in its dimension of natural illuminance and incidence of solar radiation in internal environments, showing optimized configurations for the room size and for the zenithal opening geometry.