Light drives growth. Historical light data shows you how much you can count on, and when you need help from screens or assimilation lighting.
Solar radiation is the energy of the sun that reaches your location. It is the starting point for everything else.
PPFD (photosynthetic photon flux density) tells you how much of that light plants can use at a given moment. DLI (daily light integral) adds that up over a whole day. DLI is the number most growers use to plan light.
Light differs a lot between seasons, and also between years. A report shows ten years of light at your location, so you see the normal pattern and also the dull years. That is the real range you have to plan for.
Whether you are thinking about assimilation lighting, a new screen or a different crop, start from your own numbers. A Climate-Data report gives you the light history of your exact location, and I can help you read it.
