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Nitecore NU21 vs Petzl Swift LT

Weight and specs compared for 2026 — and which one to choose.

Petzl Swift LT is the lighter option — 1 g lighter than the Nitecore NU21 (2% less weight). If grams matter to you, that is the one to beat.
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Spec Nitecore NU21 Petzl Swift LT
Weight 44 g · 0.044 kg · 0.10 lb
as listed, bracket and headband included, built-in battery
 43 g · 0.043 kg · 0.09 lb
Brand Nitecore Petzl
Category Lighting Lighting
Nitecore NU21
44 g

Ultralight USB-C rechargeable headlamp with 360-lumen white and auxiliary red beams, built for running and minimalist hiking.

See it in your base weight → Full details →
Petzl Swift LT
43 g

Ultra-compact USB-C rechargeable headlamp with 380 lumens and red night-vision mode. Made with 50% recycled materials. IPX4 rain resistant.

See it in your base weight → Full details →

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Nitecore NU21 vs Petzl Swift LT: which should you buy?

If saving weight is your priority, the Petzl Swift LT wins — at 43 g it is 1 g (2%) lighter than the Nitecore NU21 (44 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.

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