Black Diamond Astro 300 Headlamp vs Nitecore NU25 UL Headlamp

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

Both weigh the same at 45 g, so choose on features, price and fit.

Spec	Black Diamond Astro 300 Headlamp	Nitecore NU25 UL Headlamp
Weight	45 g · 0.045 kg · 0.10 lb	45 g · 0.045 kg · 0.10 lb
Brand	Black Diamond	Nitecore
Category	Lighting	Lighting

Black Diamond Astro 300 Headlamp

45 g

Ultralight 300-lumen headlamp at only 45g. Compact waterproof design with single AAA battery; perfect for thru-hikers minimizing base weight.

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Nitecore NU25 UL Headlamp

45 g

Ultralight USB-C rechargeable headlamp with 400-lumen output and dual red-light modes. Weighs less than three AA batteries.

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Black Diamond Astro 300 Headlamp vs Nitecore NU25 UL Headlamp: which should you buy?

On weight these two are identical (45 g), so your decision comes down to features, fit and price. Check the full details and current price for each above.

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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