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Black Diamond Spot 400-R vs UCO Firefly Lantern

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

Black Diamond Spot 400-R is the lighter option — 254 g lighter than the UCO Firefly Lantern (75% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Spot 400-R UCO Firefly Lantern
Weight 86 g · 0.086 kg · 0.19 lb 340 g · 0.340 kg · 0.75 lb
Brand Black Diamond UCO
Category Lighting Lighting
Black Diamond Spot 400-R
86 g

Rechargeable 400-lumen headlamp with IP67 waterproof rating, red night-vision mode, and USB-C charging in under two hours.

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UCO Firefly Lantern
340 g

Collapsible candle lantern. Classic camp ambience.

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Black Diamond Spot 400-R vs UCO Firefly Lantern: which should you buy?

If saving weight is your priority, the Black Diamond Spot 400-R wins — at 86 g it is 254 g (75%) lighter than the UCO Firefly Lantern (340 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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