Hi Brian, Matt the agricultural engineer here. Good question! Direct sunlight is exactly what it sounds like, it's sunlight that is hitting the sensor without obstruction. The bell-shaped curve you speak of could all be direct sunlight. So why doesn't the Plant's View graph show all of this as the same intensity? The Plant's View graphs show more or less the raw data measured by EasyBloom. By Lambert's cosine law, light measured on a (basically) flat surface is directly proportional to the cosine of the angle of the light source from a line pointing straight up from the surface. In other words, as the sun rises and sets, the light measured by a horizontal surface goes up and then down because of the oblique geometry between source and sensor. However, this doesn't matter to plants, who capture light efficiently from any angle. So EasyBloom takes Lambert's cosine law into consideration along with your local weather when calculating your light level (Full Sun, Partial Sun, etc.), which is based on hours of direct sunlight. So to answer your question (finally!), there is no cutoff for direct sunlight on the Plant's View graph. Does that make sense?
