OK calm down.
Lux or lumens... the real problem is these metrics do not tell you how it will work for you under your riding conditions.

Lumens usually means the total luminous flux emitted (in all directions), and Lux is lumens per sq meter (so where do you position that square meter).
And light falls off with distance. What is not quantified is the shape of the emitted beam.

If you want to ride at say 20 mph in total darkness, you need a very bright light to see both what's coming up and the obstacles.
But a person on the trail/road coming toward you will be blinded by that much light.

We need lights with more abrupt cutoffs so you can see the trail surface without blinding oncoming people.
A helmet mounted light can be good because you can steer it away from oncomers.
And, I use my helmet visor to block the bright lights coming toward me.
I've been commuting 20 years, and the lights are MUCH brighter than they used to be.

If you are in bright city lights in every direction, then you simply need very bright lights, or many lights, or luck to stay safe.