Trail: I use the lowest setting, unless it gets REALLY dark, but I point it in front of my bike so I can see what I am going to run over, if I see a biker coming towards me, I point it to the right, runners/joggers I point it to the left (we have assigned lanes here).

Street: During the day, BLINKY... you see me? GOOD! Night- HIGHEST power and same aim in front of my bike.

I still see some drivers shield their eyes, but when they do that, they are usually making left turns smack dab in front of me.......cagers! The others are in parking lots trying to turbo boost themselves into traffic.