All I can say is that the camera does not see the the lit scene the way the human eye sees it. These will be pretty fair representations of the relative difference between one and two lights, but not really accurate representations of the way the eye sees it. We see with our eyes much more than can be shown in a photo (our eyes adjust, a photo shows only an average -- too bright in the middle, too dark on the periphery). But this is the best I can do on short notice showing the difference between one Fenix L2D light and two L2D lights. (And, of course, the dirty driveway doesn't help much...)
Edit: All photos taken with lights in turbo mode.
One light (30 feet from side of house)
Two lights (30 feet from side of house)
One light (30 feet from cars, 50 feet from garage)
Two lights (30 feet from cars, 50 feet from garage)