Anything over 300 actual lumens should be good for your purposes. I have a lil Serfas usl-305 I bought for $40 that is more than enough, usb rechargeable. Hour and a 1/2 full brightness. There are any number of brand name lights that differ mostly in beam pattern, not so much in brightness. People seem to love the light and motion lights, but they come at a premium. I also had a $35 Niterider swift 350 that was awesome, but it was more of a "flood" light.

https://www.bikelightdatabase.com is a good resource to read.