To be clear, like almost every other gardening source, when I refer to direct sunlight I am referring to unobstructed sunlight not direct solar beam radiation as opposed to diffuse radiation. If I were speaking of beam radiation and diffuse radiation and their amounts, I would use be speaking of solar irradiance (and it wouldn't likely be a gardening video) and use the terms Direct Normal Irradiance (DNI), Diffuse Horizontal Irradiance (DHI), and Global Horizontal Irradiance (GHI) and give measures of it W/m².
To be clear, like almost every other gardening source, when I refer to direct sunlight I am referring to unobstructed sunlight not direct solar beam radiation as opposed to diffuse radiation. If I were speaking of beam radiation and diffuse radiation and their amounts, I would use be speaking of solar irradiance (and it wouldn't likely be a gardening video) and use the terms Direct Normal Irradiance (DNI), Diffuse Horizontal Irradiance (DHI), and Global Horizontal Irradiance (GHI) and give measures of it W/m².
