from my own observations i expect that there is a curve that fits to lumens needed and eye age
hopefully lumens needed levels off and we do not take down the local power grid turning on the lights
or we just cannot see enough to work wood and call it quits
this is where the talking shop tools come into play
am still thinking about the talking table saw fence and might not be hard to do
i know there is a blind guy or gal that does wood working