Wiktionary
virtual darkness
n. An environment that has some of the physiological effects of darkness.
Usage examples of "virtual darkness".
They suffered even more during rough weather, cold and wet, thrown about by the waves crashing against the hull, living in a state of virtual darkness.
If one can harness it properly, and take the time to seek out tools, and improvise means, then eventually if one has eyes that see in virtual darkness, in a matter of only a few hours perhaps, the door of even a heavy wall safe can be seen swung back, with its great lock reduced to hanging wreckage.