Black Diamond Astro 300 Headlamp vs Nitecore NU25 MCT UL
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.
Ultra-minimal 400-lumen USB-C rechargeable headlamp with dual white beam temperatures and red light; among the lightest performance headlamps available.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Black Diamond Astro 300 Headlamp vs Nitecore NU25 MCT UL: which should you buy?
If saving weight is your priority, the Black Diamond Astro 300 Headlamp wins — at 45 g it is 2 g (4%) lighter than the Nitecore NU25 MCT UL (47 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.