Black Diamond Astro 300 Headlamp vs Petzl Swift RL Headlamp
Weight and specs compared for 2026 — and which one to choose.
Ultralight 300-lumen headlamp at only 45g. Compact waterproof design with single AAA battery; perfect for thru-hikers minimizing base weight.
Full details →Rechargeable 1200-lumen headlamp with reactive lighting technology that automatically adjusts brightness based on ambient conditions. USB-C charging.
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Black Diamond Astro 300 Headlamp vs Petzl Swift RL Headlamp: which should you buy?
If saving weight is your priority, the Black Diamond Astro 300 Headlamp wins — at 45 g it is 47 g (51%) lighter than the Petzl Swift RL Headlamp (92 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.