Originally Posted by Ziemas

Having used halogen for years, and having switched to LED, I can say from personal experience that LED is far superior in both run time and color tone. The color tone of LED compared to halogen makes a huge difference in visibility for the urban commuter.

As for spot vs flood, for commuting one doesn't need a massive flood. I have found that a spot LED (Cateye Double Shot) provides enough spill to see the complete road with.

But to each his own, enjoy your halogen.

EDIT: 400 lumens is plenty for commuting. 1200 for commuting is simply dangerous as you'll blind on coming cars.