Different plants require different amounts of sun, and it can vary from direct sunlight to partial sunlight. For example, a tomato plant needs at least 6-8 hours of direct sunlight a day. Always read the recommendations (and our UV Planting Guide) for each specific plant before planting in its permanent location. The AcuRite Atlas is equipped with a UV index and light intensity sensor, helping you identify which plants are best suited for planting at your location.