After nursing some lower back pain for about 2 weeks I took my first run in as long this evening. It was almost dark when I started so I used the opportunity to wear my new Petzl Tikka XP2 headlight and Nathan LED vest. I'm still working on a review of these items. My initial feelings are that they'll both work well. I took it easy and ran 6.2 miles on Emerald Drive in 49:08.