Lou,
Lotsa' northern light is why I made my entire northern roof plastic. It's great. Terrible for insulation, but great for the eyes. I don't have any lighting right now. I've been working out there for two months and the natural light is terrific, even on cloudy days. Of course, work stops when the sun goes down.
Roger,
Thanks for all the info. Like most, I take into account all suggestions, pro and non-pro, from this site, then, make up my own mind what's best for me. After all, I'm the one who has to work and play in the shop.
The best advice so far has been "I'm one of the odd fellows who actually reads the instruction sheets." Thanks John, for reminding me. I'm one of the regular guys that needs to be reminded by one of the "odd" guys.
John