Black Diamond Astro 300 Headlamp vs Black Diamond Spot 400
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 →400-lumen headlamp with strobe mode and IPX8 waterproofing.
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Black Diamond Astro 300 Headlamp vs Black Diamond Spot 400: which should you buy?
If saving weight is your priority, the Black Diamond Astro 300 Headlamp wins — at 45 g it is 50 g (53%) 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.