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Fenix HL18R-T vs Petzl Swift RL Headlamp

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

Fenix HL18R-T is the lighter option — 50 g lighter than the Petzl Swift RL Headlamp (54% less weight). If grams matter to you, that is the one to beat.
Spec Fenix HL18R-T Petzl Swift RL Headlamp
Weight 42 g · 0.042 kg · 0.09 lb 92 g · 0.092 kg · 0.20 lb
Brand Fenix Petzl
Category Lighting Lighting
Fenix HL18R-T
42 g

Ultralight 500-lumen rechargeable headlamp for trail running.

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Petzl Swift RL Headlamp
92 g

Rechargeable 1200-lumen headlamp with reactive lighting technology that automatically adjusts brightness based on ambient conditions. USB-C charging.

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Fenix HL18R-T vs Petzl Swift RL Headlamp: which should you buy?

If saving weight is your priority, the Fenix HL18R-T wins — at 42 g it is 50 g (54%) lighter than the Petzl Swift RL Headlamp (92 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.

More lighting comparisons