Fenix HL18R-T vs Nitecore NU25 UL 400

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

Fenix HL18R-T is the lighter option — 6 g lighter than the Nitecore NU25 UL 400 (13% less weight). If grams matter to you, that is the one to beat.

Spec	Fenix HL18R-T	Nitecore NU25 UL 400
Weight	42 g · 0.042 kg · 0.09 lb	48 g · 0.048 kg · 0.11 lb
Brand	Fenix	Nitecore
Category	Lighting	Lighting

Fenix HL18R-T

42 g

Ultralight 500-lumen rechargeable headlamp for trail running.

Full details →

Nitecore NU25 UL 400

48 g

Ultralight 48g headlamp with 400-lumen max output and dual red-light modes. USB-C fast charging, IP66 rated. Excellent balance of weight, brightness, and batter...

Check price Full details →

Fenix HL18R-T vs Nitecore NU25 UL 400: which should you buy?

If saving weight is your priority, the Fenix HL18R-T wins — at 42 g it is 6 g (13%) lighter than the Nitecore NU25 UL 400 (48 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

Fenix HL18R-T vs Petzl e+LITE Fenix HL18R-T vs Petzl Bindi Fenix HL18R-T vs Petzl Bindi Headlamp Fenix HL18R-T vs Black Diamond Deploy 325 Fenix HL18R-T vs Black Diamond Deploy 325 Headlamp Fenix HL18R-T vs Petzl Swift LT Headlamp