I got the package today, and here are the results of the tests.
The lime green line is from a cell that was fairly cold. It's been something like 15 degrees Fahrenheit here lately so the cells got pretty chilly. It starts out lower, then increases in brightnes, presumably as the cell warms up. The second (red line) cell was kept in my pocket for half an hour to warm it up a bit and it did slightly better.
First the Varta on their own.
Now versus several other CR123a's.
The Energizers surprised me a bit since they're reportedly supposed to be the same cells as the Rayovac and Surefires.
Much thanks to westfork for sending these to me to test. They seem like an excellent value for the money.