Is “Horizon Light” a daylight source?
Not really. “Horizon” light is described as having a color temperature of approximately 2300K. It was originally considered to simulate daylight just before sunrise and just before sunset. However, this generally accounts for only ten minutes of sunlight each day. It was chosen mostly because it is extremely red in color, one of the extremes of color for color matching applications. It has been replaced by the standardized source, Illuminant A, which is a Red/Yellow source. “Horizon Light” has never been specifically standardized as an illuminant, like Illuminant A, D50, D65, or D75.
