I'm sure the 750 would be fine. It's just super complicated. I used to ride with a light with just 200 lumens and it was fine, I got a light with 800 lumens and it was worse because it was a ****ty beam pattern, and I returned it and went back to the 200 lumen light.
- Beam Pattern (how the light distributes the light it outputs)
- Light quality (the cheaper more bluish leds are not as good at the same lumen output as better leds)
- Riding conditions (total darkness requires the least amount of light to see, a mix of total darkness with super bright lights is the worst that requires the most light to see)