Back to LED lighting for just a moment,...
Yesterday, I had to D/T two holes in a new LEE 6C for set screws for the two sprue-plate screws.
I had a really tough time reading the numbers on my drills and taps - like someone came and wiped them all clean of any information at all.
I struggled for a while, with bifocals, without bifocals, asked my wide to put a big magnifying glass on her shopping list because I was going blind!
FINALLY, I stepped out into normal daylight and was able to make out "10-32" on the two taps and "28" on the twist-drill I had in my hand.
Went back inside and could NOT read them, even though I now KNEW what each one said. I thought it was dimness, but I have a drafting light on one bench that I pull down right over something I really need to see - "100W" equivalent, and I still could NOT read those figures on those tools. I don't know if it was the LED lights I'm using, but I was able to read them just fine in diffuse daylight.
I know I could have grabbed a mic' and made short work of the size confirmation, but that wasn't so much the point when I thought I was suddenly much more blind than I thought I was.