Personally, I think LED tint is just as important as brightness, if not more important. With most of these LED lights claiming so much brightness, with the cool white LEDs. I feel like color and sometimes depth perception suffer too much. With neutral white or warm white, I can spot road hazards MUCH better!
Awhile ago, I purchased two 4sevens Quark 1xAA tactical lights and a set of two-fish blocks to mount on our bikes. One for my spouse and the other for me, she got the standard cool white rated at 109 OTF (real lumens). I got a limited edition warm white LED rated at 58 OTF lumens.
At night, she hits enough potholes and crap on the road, that she has me lead so she can see. I did give her light a try once.. I feel like everything is nearly monochromatic and I have a hard time telling what is what. So I see shapes, but that doesn't work for me I guess.
All in all, this is my advice for anyone looking for a bike light to use in urban roads or trails.
Neutral or warm light with CRI 75 or higher
enough spill light adequately to see your entire path (minimum one car lane)
Can use rechargeable batteries
light weight

What is a fun test to do is, take your typical cool white LED flashlight and shine it at a bush with red berries, ask someone to count the berries. Now repeat that with a basic incandescent flash light. It is quite a difference if you ask me.