BioLite HeadLamp 400 vs Nitecore NU21
Weight and specs compared for 2026 — and which one to choose.
Rechargeable headlamp at 2.6 oz / 75g with 400 lumens maximum output and a moisture-wicking fabric strap. Front-facing tilt, USB-C charging, and weather resista...
Full details →Ultralight USB-C rechargeable headlamp with 360-lumen white and auxiliary red beams, built for running and minimalist hiking.
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BioLite HeadLamp 400 vs Nitecore NU21: which should you buy?
If saving weight is your priority, the Nitecore NU21 wins — at 44 g it is 31 g (41%) lighter than the BioLite HeadLamp 400 (75 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest lighting page, or browse the full gear weight database.