Fenix HM75R PRO vs Acebeam H18: Which Headlamp Should You Wear?

Two 21700 headlamps, two very different ideas of what your forehead is for. The Fenix HM75R PRO wants to light up the far side of the canyon. The Acebeam H18 wants to light up the stove, the tent zipper, and whatever you just dropped in the grass.

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Fenix HM75R PRO: Check price on Amazon Buy from Fenix

Acebeam H18: Check price on Amazon Buy from Acebeam

On the Fenix Amazon listing, confirm the title says HM75R PRO (not the older, non-Pro HM75R). For the Acebeam, confirm it says H18, not H17 2.0 or H30.

Short verdict

Pick the HM75R PRO if you need real reach hands-free: work sites, search and rescue, caving. Spot plus flood on a rotary switch, 398 m of throw on paper, $139.95 at Fenix.
Pick the H18 if your nights are camp chores and trail walking: smooth wide flood, a 630 nm red mode, USB-C on the light and the cell, $109.90 at Acebeam.
Pick neither for running or as a cheap glovebox backup. Both are big, serious lamps.

How I chose these

Both lights already have full reviews on this site, built from the makers’ own spec sheets and manuals (HM75R PRO and H18 are both spec-based first looks). Every number in the table below comes from those review pages. Nothing here is a lab test, and I say so on purpose. I put the catches (step-down, size, charging quirks) next to the good stuff, because the wrong light is a bad deal at any price. Prices move; the buttons show today’s price.

Last checked: October 27, 2026

Fenix HM75R PRO headlamp — Fenix HM75R PRO. Photo: Fenix Lighting.

Acebeam H18 right-angle headlamp — Acebeam H18. Photo: Acebeam.

Spec comparison

Spec	Fenix HM75R PRO	Acebeam H18
Max output	3,500 lm (spot + flood together)	4,000 lm (6500K) / 2,700 lm (5000K high-CRI)
Throw	398 m spot	162 m (6500K) / 140 m (5000K)
Beam style	Spot, flood, both, plus red; rotary switch	Optical-lens wide flood, plus red (630 nm, up to 70 lm)
Battery	Replaceable 21700, USB-C ~1.5 h	Removable 21700 6,400 mAh; USB-C on body and cell
Toughness	IP68, 2 m impact	IP68, 2 m drop
Weight	214 g with battery and headband	190.6 g full kit
Turbo	Steps down (accept it)	4,000 lm for 30 s, then 700 lm (6500K)
List price	$139.95 at Fenix	$109.90 at Acebeam

Source: Fenix HM75R PRO review and Acebeam H18 review on this site. All figures are manufacturer claims unless marked as a third-party measurement.

What actually separates them

Reach. 398 m vs 162 m is not a rounding error. If you need to see a trail marker or a hazard far off, the HM75R PRO is the one built for it. The H18 is a flood light that happens to be bright; it’s not trying to spot anything across a lake.

Close work. For cooking, map reading, and finding the one tent stake that rolled away, the H18’s wide flood and the 5000K high-CRI option (CRI 90) are the friendlier pick. Colors look like colors.

Turbo is a burst on both. Neither one holds its box number for long. Shop the mid modes. If that’s new to you, read Turbo is a burst.

Price. The H18 is about $30 cheaper at list. The HM75R PRO earns the extra money only if you’ll use the throw.