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Black Diamond Astro 300-R vs Black Diamond Spot 400

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

Black Diamond Astro 300-R is the lighter option — 11 g lighter than the Black Diamond Spot 400 (12% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Astro 300-R Black Diamond Spot 400
Weight 84 g · 0.084 kg · 0.19 lb 95 g · 0.095 kg · 0.21 lb
Brand Black Diamond Black Diamond
Category Lighting Lighting
Black Diamond Astro 300-R
84 g

Compact rechargeable 300-lumen headlamp.

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Black Diamond Spot 400
95 g

400-lumen headlamp with strobe mode and IPX8 waterproofing.

Full details →

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Black Diamond Astro 300-R vs Black Diamond Spot 400: which should you buy?

If saving weight is your priority, the Black Diamond Astro 300-R wins — at 84 g it is 11 g (12%) lighter than the Black Diamond Spot 400 (95 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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