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BioLite HeadLamp 400 vs Black Diamond Spot 350-R
Weight and specs compared for 2026 — and which one to choose.
BioLite HeadLamp 400 is the lighter option — 9 g lighter than the Black Diamond Spot 350-R (11% less weight). If grams matter to you, that is the one to beat.
BioLite HeadLamp 400
75 g
Rechargeable headlamp at 2.6 oz / 75g with 400 lumens maximum output and a moisture-wicking fabric strap. Front-facing tilt, USB-C charging, and weather resista...
Check price Full details →BioLite HeadLamp 400 vs Black Diamond Spot 350-R: which should you buy?
If saving weight is your priority, the BioLite HeadLamp 400 wins — at 75 g it is 9 g (11%) lighter than the Black Diamond Spot 350-R (84 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.