larry, this thread and the sunlight one are really buggin’ the bejezus outta me. The only real data you have given us thus far about your proposed shop is that it may have a six in twelve pitch truss roof. The only questions you have asked are which corner has the best light for finishing and what are the best skylights.
Since you have not been very forthcoming with us, I will respond in opposite kind:::!
1) Orient the ridge of your building 15° east of the E/W line.
2) Put some windows on the South side. Winter light will penetrate deeply into your shop… you may wish to diffuse and/or refract this light to reduce contrast in winter
3) Seat the trusses 10 foot high.
4) Scratch the skylight idea right now… they are for selling condos.
5) Scratch as well any thought of a cathedral ceiling…heat rises.
6) Build your ceiling at the ten foot level of your trusses. It will be cheap and easy to insulate.
7) Install some of the tube lighting that others have recommended. Whether in winter or summer, or on the north or south slope of your roof, those babies spread light all over in a very usable way. Skylights tend to create areas of very bright light and shadow… Also remember that in Michigan the sun is close to directly overhead on the summer solstice, so skylights will tend to heat your shop, whereas a light tube will transmit diffuse light to your workspace through a ventilated attic.
8) Oh right, ventilate your attic. If you put on a metal roof, use ½” double foil-faced polyisocyanurate between the trusses and the roofing… it will prevent sweating and dripping.
9) Randi tells me that you do your best work after dark, so wire Kelvin and Lumens on your ceiling too. I got a bunch of 4 foot, 4 bulb, T-8 stuff at the HD that had armored cable outfitted with connectors and even dielectric grease quick connects for <$50 ea.
10) Don’t go overboard and light your shop too evenly. Provide adjustable task lighting at planning benches and in your finishing area.
I know that Steve probably told you all this same stuff, but if you want a third opinion ask Karl.
Regards,
Frank