I can tell you at 72 without enough light your finish will puddle and you won't notice it for a few months!
Just put 1/4 on 4 different switches so you can adjust the amount of light for different times and needs.
Are they LED or fluorescent ? Most of the LED ones I have been looking at are dimmable. If you were closer I could bring my light meter over and see how many footcandles are actually delivered at workbench height. I am in process of choosing lights right now and am shooting for at least 100 foot-candles at 36" but I like (and need) a lot of light.
Hi
When I built my shop I used a lighting program, it recommended more than I thought but in 11 years I have been using it I think I may need even more.
One important thing is to make the floor color a strong contrast to the white walls and ceilings. This was recommended to me by and industrial designer.
It is very easy on the eyes. The color I used was dutch boy porch tile red. You would be surprised how easy it is to find a small part ie 0 - 80 nut on that
color. It has held up very well considering the primary work I do is metal working ie lathe, mill etc. Its on concrete and has not peeled. I scrub the floor
twice a year and it still looks just fine.
Good luck
Bob
Listen to us. We know of what we speak. I thought I had more than enough light when I built my shop, but I swear the electricity is getting weaker because they just aren't as bright as they used to be. :icon_scra