Running with head lamp

I have literally kicked it into gear since signing up for the half marathon last week. I ran 4 miles the day before and then ended up with a headache consistently for the next 5 days. That three me off but I decided today to run early in the morning with my Molly baby. I ended up walking a lot when headache came back. Tonight I needed to move an mostly headache free by this afternoon I decided to make up for it and did another two miles tonight. There have been multiple times the last couple weeks that I have sucked around something last second, and wished I had a head lamp. Thi time I went for it. My awesome husband had one so I made it significantly smaller and then took off. There were times I bounced and it collected sweat kinda funny and gross. But if I moved it over slightly I feel this would be effective, and because I want to keep the exercise in the shorter days this seems like a great way to go!