Lighting for the street is different from lighting on a narrow bike path. Where I live, the off-street bike paths aren't even open after dark most days (run by city parks, who don't really care about commuters).
I have about 500 lumens on the bars, usually run in strobe fashion. The light gets aimed downward, pointed to a spot about 1-2 carlengths ahead of me. The light rarely gets aimed directly at a driver (and only when I intentionally move it there to get someone's attention). But it's bright enough that drivers have no problem seeing light that spills out to the periphery of the beam. On the back, I've got about 200 lumens in a mostly regular blink pattern (slower flash than the strobe on the front). I also have reflective rims and tire sidewalls, colored blinkies in my spokes, red and white reflective tape on my fenders and pannier boxes, and some yellow striped reflective tape on my pannier boxes. The rear surface of the boxes also has the word "BIKE" on each side in reflective lettering, emphasizing what I am in case there was any question. I have reflective tape on my helmet, and reflective velcro cuffs for my pants legs.
Drivers give me more space at night than they do during the daylight.
I use the same lighting setup on one-way bike lanes.
If I happen to be using a narrow two-way bike path in the dark (illegally), then I turn my lights off. Of course all the reflective surfaces would give me away, anyway, from nearby streetlights or patio lights.