Acebeam H16 Review – (Nichia 519a, 650 lumens, Dual Fuel)

Today I am taking a look at the newest right angle headlamp from Acebeam with the H16. It’s a single emitter light with 2 available LED options, in the AA/14500 size format. The H16 shares a lot of design and functions with the similarly sized Pokelite AA that I have reviewed last year. Thanks to Acebeam for sending this one to me to look at and review. Any discounts or deals that I have for this light will be posted in the description below this video along with links to my social media pages. 


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Packaging & Accessories

The packaging is a white retail box with color photos and highlights of the light on the front, there are no technical specs on the back like you commonly see, just contact info for Acebeam. The light and accessories sit inside a plastic tray inside and it comes with the light itself, and Acebeam branded 900mAh 14500 battery with USB-C charging on board, a short USB-A to C charging cable, the headband, 2 extra orings, and user manual. 


Construction & Design

The light is made from aluminum and hard anodized in either a black or gray color. The black which I have here is the high CRI option and it’s only available in black. The gray body color is exclusive to the cool white emitter too. The design characteristics are pretty similar with the Pokelit AA model with a few differences. 

The tail cap is flat and has a strong magnet that easily holds up the light. It features nice knurling for grip for easy battery removal. The body tube has ribs in the center and places for the clip to mount at the front or rear. The body tube itself is glued to the head of the light.

The head has some fins cut opposite the emitter for heat dissipation. The electronic switch is sitting at the top of the head and is covered by a shallow rubber/silicon boot that’s smooth. The business end of the light has a shallow bezel, glass lens, and smooth reflector. Markings on the light are pretty minimal, with the CCT and CRI being marked on the side of the head, the brand and model being marked just under the bezel, and the export and battery marks on the bottom of the cap.


User Interface

The UI here is very simple with the electronic switch found on top of the head. With the 14500 battery, you have 3 modes without memory mode. Click and hold to come on in the lowest mode or double press from off to turn on in low.. Once on click and hold to go up in mode groups. Double click to turbo when on and triple click to a slow strobe. Single short click to turn off. It’s a very simple user interface that I think anyone can understand. Mechanical lockout is easy to trigger by just breaking the seal on the tail cap.



The Clip is an uncaptured dual-direction pocket clip that can mount two ways on the H16. You can mount it near the rear of the light to give you a very deep carry, since the clip actually goes past the end of the light. The downside of this is the button will be inside the pocket and in my opinion easier to accidentally trigger, although it does still require a long press to turn on and comes on in low. The other place it mounts is hear the head but a fair amount of the light will stick out when doing this.

The H16 comes with an orange elastic 2 strap headband. It has a nice comfortable silicone mount, but requires the clip to be removed before mounting. On the sides you do have some reflective markings and Acebeam branding, holes in the material for style and ventilation, and then on the inside you have silicone grip strips to help it keep in place on a helmet. I found it to be lightweight and comfortable to wear.


LED & Beam

The H16 I have here is using a Nichia 519A LED in neutral white. I measured this LED at 4912k and 97.9Ra on my Opple light meter, without any color casts in the DUV data. The beam here is fairly floody with a large well defined hotspot and not a ton of spill. Good for the application here, as it’s optimized for closer-up use. There is some PWM that I could measure on my meter when on High but it’s very fast and I can’t see it with my eyes. 



Since this light is dual fuel and will run on both a Liion or NiMH battery, I will give some output data for both. One thing to note here is that light is available with a different LED that is brighter if you wish but you do give up the neutral tint and high CRI. All measurements were taken at the 30-second mark according to FL1 Standards. In general on the Li-ion battery that I measured on my Texas Ace Lumen tube was lower than Acebeam’s claims. If I had to guess they are listing startup lumens, not FL1 standards. For my Alkaline/NIMH tests, I used an Amazon Basics high-capacity AA battery. Acebeam doesn’t give official outputs for the use of this light with Alkaline or NiMH, and I think thats due to the extremely low outputs in the first 3 modes. The only one I got to give me a solid reading was medium at about 2 lumens. The light is only really useful on Turbo and that steps down pretty quickly which I will get to in the Runtime section coming up soon. My advice would be to stick with the Li-ion battery the light comes with and really only use a AA or NiMH in an emergency situation. 


Heat & Runtimes

I focused primarily on the heat and runtime on the H16 when using the included Li-ion 14500 battery since that’s really where the light is best. Turbo lasts for 2 minutes to complete the total stepdown to about 180 lumens while staying above 500 lumens for the first 55 seconds. From here it’s a pretty steady decline and looks to be somewhat unregulated. Peak heat was at 18 minutes at about 48C on the exterior of the light. High output is an almost identical runtime, with the only difference being a few more total minutes of runtime. 

The NiMH on turbo mode the H16 has a pretty minimal output time of less than a minute before stepping down to about 35 lumens. It will run at this state for about 9:10:00, and then continue to run past 24 hours at sub-lumen outputs. This really isn’t very effective light in most situations though. 



While the H16t itself doesn’t have built-in charging, the optional Acebeam 14500 battery does have built-in charging via USB-C. I had no issues charging this via USB-C to C or PD. Charging here is at 0.5C about .45A at the maximum for most of the charging time. The overall charging time is 2:30:00 at which time the LED on the battery itself goes from red to green. The battery itself has LVP built into it. I measured LVP at 3.103v and full at 4.174v on the Liion. The NiMH measured 1.23v when the light shut off. 



The Acebeam H16 Fishing Headlamp is a decent light if you’re looking for small form factor, neutral white and high CRI. Just be aware that it doesn’t have the most output nor can it sustain those larger numbers for that long. I don’t think this is an issue as long as your use case is up close needs. I would recommend the headlamp for more specialized applications where light weight and size is of high importance. I wouldn’t recommend this headlamp if you plan to run it with a AA or NiMH batter. It’s performance and output runtime is really optimized for Li-Ion batteries. I would only use AA or NiMH in times of emergency. Keep in mind this does come in a different LED model where you can get up to 1000 lumens on turbo too if you’re needing a bit more output.