For after-work rides in darkness, I use a MagicShine 900 (claimed) lumen light on the handle bar and a Cygolite Expilion 250 on my helmet. Both of my lights are older editions, but this setup works well for me. Typically, I run the MagicShine on low power and the Expilion on medium power.

I have a couple of PlanetBike Super Flashes and a Cygolite Hotshot for tail lights.

So far so good with this configuration.