Well, I did some looking last night and have been educating myself as to which lights to go with for my height (12'). Since I don't have existing fixtures it seems that the linear high bay lights/fixture is what I need. After reading, the UFO style is better for heights around 15' and up. 12' height is considered low bay but the lights are still called high bay or I'm misunderstanding the nomenclature. With my ceiling height I'm thinking around 15,000 to 17,000 lumens--5000K color.
This site explained a lot: LED Linear High Bay Lights are a Great Choice for Warehouse lighting
Thinking about going with something like these: 11 watt - Orion II Series LED High Bay Linear Lights - 17,
This site explained a lot: LED Linear High Bay Lights are a Great Choice for Warehouse lighting
Thinking about going with something like these: 11 watt - Orion II Series LED High Bay Linear Lights - 17,