This thread is all to funny. I'm out there all Saturday night riding with an old Dinottee and Fenix LD20 mounted with strips of inner tubes. The LD20 worked perfectly, and I got to point it at cars, and on 8 separate occasions - I get them to knock down their high beams from acceptable distances.

I rode 185 miles, 115 of those miles after dark. I continued to switch the LD20 back and forth from turbo as needs presented themselves. I changed out batteries, both time before turbo mode failed. For people who are actually riding all-night - you quickly discover that a high quality 120 lumen beam is enough for most pavements and conditions.

I'm not saying don't get crazy - just that unless you are single tracking along the edge of the Grand Canyon or descending Mount Elbert on the steep side, you don't fffing need 500 lumen. (but I've got an MS on order anyway)