I have been a worker using machines for a long while.
When I use a machine, I don't rely on watching it, I listen to it.
When it fucks up, no matter who I'm with, I shut that machine down. Because I listen to the machine.
The reason this is the visual topic is because of single overhead lighting.
I listen to them., but with a single tube above, it gets fucked. It really fucks with the sound/audio that I'm looking for.
There is a pulse.
Does anybody know this?.
Makes sense. Many people would tell you when operating any new machine, to listen as much as look. As you cannot always see how certain mechanical things are working inside the machine, with some idea of how these parts operate, listening can give you better insight in case of malfunction.
As far as lighting conditions go .. perhaps the lack of clear lighting from a single, dim flourescent tube isn't enough to provide sufficient or clear visual information.