Keeping it simple by providing the features you need and nothing extra the Cosmo 350 Headlamp has a max 350 lumen output, red night vision, and is rechargeable.
Patented digital lock feature safeguards against accidental use when stored in a pack or pocket.
We trust what we make because we use what we make. We trust what we make because we use what we make. All Black Diamond lighting products are covered by a three year warranty policy. Learn More
From clean climbing, to conservation, Black Diamond is committed to protecting the people and places we love.
Combining six decades of innovation with Black Diamond’s unique company culture of using and testing our products in the mountains. Our experience outdoors is what inspires and informs our engineering in the lab, and in turn the engineering leads to new gear and apparel that improve the mountain experience.
Overall rating: 4.7906976 / 5 from 43 reviews.
The Cosmo 350-R Headlamp is praised for its long-lasting battery, smooth beam, and heavy-duty light, making it a favorite for camping, home use, and outdoor adventures. Customers appreciate its value for money and reliable performance.
Review topics: [weight, color, charge, works, headlamp, light, battery, beam, features, option, usb-c, brightness, lamp].
"VERY nice light. Works well. One star off for the micro-USB. In this day and age, needs to be USB-C."
"Has worked great for me so far. The lamp is very bright and the different modes provide flexibility. The red lens is a good brightness as well. It’s relatively light, and isn’t uncomfortable to wear. The charger being outdated hasn’t been an issue for me personally, but it would be nice to have USB-C instead of the Micro-USB."
"I've had this light for years and have used it camping, hunting, for SAR operations, and around the house. I just bought a few more, one for a gift and another for me to have laying around. Good beam/brightness options, long battery, light weight. Only thing wrong with this light is that the charging port needs to be updated to USB-C. Update the charging port and this is a 5-star light."
"Super bright, recharged quickly"
"i love the rechargeable battery life, and the red light feature is great for reading in the tent without the brain shock of bright, white light."
"Purchased as a backup for my much larger Princetontec Apex headlamp. Very impressed with this little guy, surprisingly powerful for such a small package."
"stands up so far. easy to use and adustable. Can't wait to test it's water resistance paddling in 2026"
"Stays charged for a long time, and super bright!"
"I like these black diamond headlamps so much. Something about the way they do the headband makes it very easy for me to adjust to my head. Lamp tilt down and can shine in my path. The dimming feature can get a nice dim, white light. Or the full bright is exceptionally bright. I use this when I'm backpacking. I like that the rechargeable option will work with my battery pack so that I don't have to carry spare AAA batteries anymore."
"Love BD headlamps, and love this one in particular for its light weight, functionality (red light a must!), rechargeable long battery life. My one ding on the BD headlamps is that the headbands tend to stretch out over time, so I have to replace them every few years."
HOW TO: Operate Your Black Diamond Headlamp
