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Black Diamond Firstlight 2P vs Six Moon Designs Lunar Duo

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

Black Diamond Firstlight 2P is the lighter option — 90 g lighter than the Six Moon Designs Lunar Duo (7% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Firstlight 2P Six Moon Designs Lunar Duo
Weight 1,180 g · 1.180 kg · 2.60 lb
as listed; page does not say whether minimum or packed weight
 1,270 g · 1.270 kg · 2.80 lb
as listed; tent with stuff sacks and guy lines, excl. stakes and poles
Brand Black Diamond Six Moon Designs
Category Shelter Shelter
Black Diamond Firstlight 2P
1,180 g

Freestanding 2-person geodesic tent for 3-4 season use.

See it in your base weight → Full details →
Six Moon Designs Lunar Duo
1,270 g

Spacious 2-person trekking pole shelter with side entry.

See it in your base weight → Full details →

Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.

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Black Diamond Firstlight 2P vs Six Moon Designs Lunar Duo: which should you buy?

If saving weight is your priority, the Black Diamond Firstlight 2P wins — at 1,180 g it is 90 g (7%) lighter than the Six Moon Designs Lunar Duo (1,270 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 shelter page, or browse the full gear weight database.

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