Sorry Steve, I do need to press you a little on this. What do you mean by that? Our eyes adapt to low light today don't they? Our pupils expand and contract according to the light available right? So if we are plunged into low light, at first we might not be able to see very much but then our eyes will adjust after a few minutes.
Now Pierre says that there were people working in "complete darkness" in the British Empire and Phil responds by saying that Pierre has "a point worth thinking about" because our eyes are "accustomed" to bright light whereas in the Victorian period their eyes would be "more accustomed" to less light.
But surely the working of our eyes is exactly the same today as it was 125 years ago isn't it? Regardless of what one is "accustomed" to, the eyes work in exactly the same way, adjusting to the amount of light available.