Krystina B.wrote a review of Black Diamond Cosmo Headlamp on July 31, 2017
Familiarity: I've used it once or twice and have initial impressions
This got me through a 3 night trip with no problems. I liked that there were different brightness settings, as well as a red light. I tended to use the lowest setting as an overhear light in my 2 person tent and the brighter ones for navigating paths in the campsite. Used the batteries that came with the headlamp without any issues.