I've got a wide range from $7 blinkie sets to 1200 lumen headlights.

For actual commuting anywhere that isn't lit by streetlights, my 350 or 450 lumen NightRider is a good price/performance sweet spot. The 1200 lumen isn't really any brighter, it just lights up a lot more, not really all that necessary on a road. As others have mentioned, the Cygolite Hotshot is a great rear choice, especially if you want to run it during the day.

And since no one has done it yet, obligatory lights on bike in front of a wall pic, with the Cygolite on the back: