Forgot your main headlamp? Be glad you kept this tiny little guy in your pack as a backup. Just remember to put it back when your done. More than bright enough for early morning/late night tours especially for its size and weight. I got two just so I could have one to use around the house they are that useful, especially when you live in a cabin out in the woods. Comes with a red light, and green mode as well. (If you want to trick your buddies that The Truth is Out There). Extremely useful bit of kit to make outdoor adventures safer and more enjoyable.