Lighting systems generating visible-light emissions for dynamically emulating sky colors

A lighting system, comprising:

• a visible-light source including a plurality of semiconductor light-emitting devices, the visible-light source selectably generating visible-light emissions having a cyan-ish color point, being a perceived color point having a dominant wavelength within a range of between about 480 nanometers and about 540 nanometers, the visible-light source also selectably generating the visible-light emissions as having an orange-ish color point;
• an optical system being integrated with the visible-light source, the optical system being arranged to combine together, into combined light emissions, visible-light emissions from semiconductor light-emitting devices among the plurality of the semiconductor light-emitting devices;
• a mounting system being integrated with the visible-light source, the mounting system being arranged for directing the combined light emissions as being up-light emissions;
• and
• a control system being coupled with the visible-light source, the control system selectably causing the visible-light emissions to have the cyan-ish color point or the orange-ish color point;
• wherein the control system and the optical system cooperatively form the combined up-light emissions as having a dynamic spectrum for emulating an orange-ish sky color having the orange-ish color point at a time of day selected to represent a sunrise sky or to represent a sunset sky, and changing over time for emulating a cyan-ish sky color having the cyan-ish color point at another time of day selected to represent a mid-day sky.