There is one aspect that hasn't been discussed in depth here, that being beam alignment.
I see lots of talk of lumens output however for me beam control is much more important, the light should be controlled with as little spill as possible, not only is this better for the rider but also for other road users as well, no point lighting the trees up even if one thinks it improves "the view".
I know from bitter experience and it is actually one aspect of PBP that I'm not looking forward to is waves of riders coming towards me with very bright but uncontrolled lights, quite frankly it hurts and it's dangerous as it destroys my night vision, this is exacerbated by being a recumbent rider and being lower down.
There is an option of course to use German approved for road use lights that a horizontal beam cut off and can be used on road, other none controlled lights are illegal with riders facing an on the spot fine (there may be other countries that have this requirement).
I currently run two B&M 80lux units but am seriously thinking about upgrading to an e-bike road approved light either possibly a 45kph approved one, although battery life will be a major factor.
https://supernova-lights.com/en/m99-mini-pro-45/I've found this useful in explaining the different "brightness" quoted for lights
https://www.cyclinguk.org/article/technical-guide/watts-lumens-candles-lux.
Some of the lights I've been looking at have similar Lumens quoted but widely different Lux ratings and power ratings, an example being 1000 lumen (Output) for both but different lux (Measured light hitting target) and different Wattage (battery life) so I would choose one that had a higher lux rating (so more actual light hitting the ground) and the lowest wattage (so more efficient), the knock on effect is that to get the correct combination results in spending more money!