BioLite HeadLamp 400 vs Black Diamond Deploy 325
Weight and specs compared for 2026 — and which one to choose.
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 →Minimalist compact headlamp at just 40g. 325 lumen max output with single-button operation. Folds flat for easy stashing in hip belt pockets.
Check price Full details →BioLite HeadLamp 400 vs Black Diamond Deploy 325: which should you buy?
If saving weight is your priority, the Black Diamond Deploy 325 wins — at 40 g it is 35 g (47%) lighter than the BioLite HeadLamp 400 (75 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.