BioLite Energy Range 400 Headlamp vs Black Diamond Storm 500-R
Weight and specs compared for 2026 — and which one to choose.
400 lumens, 1634 mAh Li-ion battery, USB-C charging, IP67 rated. Best headlamp of 2025 for backpacking functionality.
Full details →Rechargeable 500-lumen headlamp with waterproof design.
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BioLite Energy Range 400 Headlamp vs Black Diamond Storm 500-R: which should you buy?
If saving weight is your priority, the BioLite Energy Range 400 Headlamp wins — at 75 g it is 36 g (32%) lighter than the Black Diamond Storm 500-R (111 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.