What are the best wall pack lights to use on the exterior of a shop if you are looking for a good light source, not just dim security lights?
Define "best". You can buy wall-pack lights in metal halide or HPS that will provide tons of light. You may or may not find something suitable at your local home center. A better bet would be to look at a lighting store, electrical supply house, or industrial supply house like Grainger. They aren't cheap.
The link below is informational only, not a recommendation as to a manufacturer or vendor.
Here is a link that might be useful: Lithonia Wall pack