Here is what I settled on: Commercial Electric 2ft Industrial High Bay Light, suggested mounting height 16-24Ft, 500K, 171 input watts, 120-277vac, Daylight, 18,000 Lumens.
I bought them at Home Depot; $99.00 less my 10% Military Discount.
I mounted four of them which provides more than adequate light for normal garage operations, however for machine shop ops I'm going to install five more. Probably be brighter than a sunny day in Oregon. When they are all in I'll post a picture. Ceiling height is 13', sqft is 1200.
Thanks for all the great info.---Matt