Review: Acebeam H40

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Lumeniac
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Review: Acebeam H40

Compact headlamp with infinitely variable brightness and 14500 \ AA powered by Acebeam H40.

There are almost no 14500\AA headlamps on the market. Taking into account the choice of 1000lum\600lums HiCri and infinitely variable brightness, the model looks quite tempting.

official page of this model
you can *buy Acebeam EC65 *from Nitetorch store here
(they offer great price for all the Acebeam stuff, make sure u proceed to checkout, there will be 15-20% discount code that you can apply and make price even lower.)
or at AMAZON

There are 2 versions of this model, brighter with XP-L HD and less bright, but with neutral light and high color rendering index. I will review the last one.

Characteristics (taken from the site of the dealer):
Cree XP-L HD LED with a working capacity of at least 50,000 hours (more than five years of continuous operation);
Maximum brightness: 1050 lumens;
Peak intensity: 2600 cd;
Range: 102 meters;
Power Supply: 1xLi-ion (700mAh) / Ni-MH (1900mAh) / Alkaline battery;
Maximum operating time: 52 hours;
Impact resistance: 2 meters;
Waterproof: IP-68 standard;
Dimensions: 64.7×26.9×23.4 mm;
Weight: 34 grams (without battery).
durable aviation aluminum body with additional anodizing of the outer surface to protect against corrosion;
ultra clear tempered glass lens with anti-reflective coating and light transmittance more than 98%;
microtextured reflector for maximum light output;
digital voltage stabilization for uniform brightness of the light flux as the battery is discharged;
protection from overheating of the LED and electronic components (the control driver of the flashlight automatically reduces the brightness after a certain time of the diode in high brightness levels / the features of the function depend on the type of battery used);
compact dimensions and low weight.

This modification is based on the Luminus SST-20 CRI 95+ LED, emitting a luminous flux that is as close as possible to natural warm sunlight. With this feature, the flashlight will be an excellent choice for professional photographers, as well as the category of users who need to achieve maximum color reproduction of the illuminated objects.

Maximum power: 600 lumens;
Operating time (in the minimum mode): 52 hours;
Range: 106 meters;
Peak intensity: 2832 cd.

Package and appearance

Good design, reliable and colorful packaging. Taking into account the fact that a relatively small price makes this headlamp interesting from the point of view of a gift, the package here does not disappoints.


Inside is a standard set: a headlamp with a headband itself, manual/warranty card, o-ring. Everything. I think that it would be possible to put the battery, they cost not so much.

Headband – standard “pants”. Here all that is needed: light-reflecting stripes outside, and sweat preventing gel strip inside.


Well, here is the headlamp. It is really extremely small in size, slightly larger than the battery itself. Worn on head, you almost don’t feel it.

In essence, the Acebeam H40 is an ordinary T-shaped headlamp, made in an unusual small size. And there are no unusual external features. Look here.

Both ends are smooth, without magnets (since the latter are usually placed in L-shaped headrest, this is not surprising. I just just clarified this fact just in case). One end is easily twisted battery compartment cover.
Due to the tenacious knurling and good lubrication, twisting it is not a problem.







Inside, just in case, there is an indication how to place battery correct way.

There is a spring in the tailcap, there is a contact pad at the opposide side.

And one more thing to show. Here you can see the copper pad that transfers heat from the LED to the flashlight body itself. The headlamp is operated by a single soft orange button. The move is average, sensible click. The button is quite comfortable in size. On the opposite side are the cooling fins. Though they are small, but looks decent and proportional regarding to overall dimensions of H40. There is nothing much to do here. And, well, they do they job, just check the “stabilization” part below.

The reflector is shallow, textured.

The bezel twists without problems, giving access to the insides. everything looks neat here. Acebeam is a good company and I have not heard any complaints about the build quality of their products.

Overall impressions are positive. H40 is small and neat. Both it and it`s packaging look nice and leave the impression of a good branded item. Worn on head, due to the insignificant dimensions, it is not felt at all. Well, I know for sure that there is a category of people who are consciously looking for minimum size and are ready to sacrifice brightness for this. This thing will please them 100%.

UI

It is quite a simple and convenient. There is all the necessary, i.e. access to extreme modes and blocking.
off / on – 1 click (there is mode memory)
Button hold starts the minimum brightness
2x click launches turbo
3x click launches SOS
holding button when ON starts a gradual increase or decrease in brightness. at the maximum brightness (high, not turbo) this ceiling is confirmed by 3 flashes, the minimum brightness is indicated by 2 flashes
lock and unlock with a 3 second hold.

PERFORMANCE

Let me remind you once again that I preferred a much less bright, but definitely more pleasant Hi-CRI version. Accordingly, in the photo-video below, it is worth making an amendment to the fact that the CW version will be significantly brighter: 1050 lumen versus 600 at the maximum (and there will be a difference in other modes too). To some, such a conscious choice of a less bright option will seem strange, but personally I think that a good light is the same functional characteristic as brightness. In any case, this is a good and rare example of how a manufacturer goes to meet two main groups of customers: those who are looking for greater brightness and fans of a more pleasant-looking light.

There is no visible PWM shimmering in any mode.

Light distribution is quite convenient for close range work. This is not a full flood light, there is some hotspot here, which allows us to speak about symbolic throw (to be honest, quite sane for a headlamp with such dimensions), but still there are much more sidelight then throw. Here for comparison all the same S2 +.

Should I say that tint and CRI are perfect.

As for stabilization, then everything is quite good for yourself. But i dont think turbo in AA mode will have any advantages over High.



Well, for work alive. There will be a video below, you can see examples of work there as well. So, if we talk about stabilized brightness, then it will definitely enough for walking around the camp or jogging. Turbo allows, albeit briefly, to enlighten a relatively good distance. Of course, when 14500 is inside. we a The photo will contain examples of work from Ni-Hm, you can also evaluate it.

If we talk about using Acebeam H40 indoor, then the power of the it is definitely enough. 15-20m distance looks quite illuminated. Even in Low mode i see some hotspot there.

Longer distances outdoor, which is not surprising, will be just symbolically illuminated. I do not think that even a brighter version of the Acebeam H40 will be able to show the best result here. After all, with such a small reflector, it would be naive to rely on something beyond fifty meters. But, standing on the ground shine on 13-15 floor is quite possible.

*OVERALL IMPRESSIONS


Due to its size, this headlamp is not for a wide audience. Many will not be able to abandon the long duration of work and high brightness for the sake of compactness. But! I consider it fair to evaluate this headrest from the perspective of the audience for which it was created. After all, it is senseless to evaluate a dump truck from the position of Smart driver and vice versa.

In my opinion, a person who is consciously looking for a compact headlamp, will receive the expected. But there are still a lot of such people, and a fairly large assortment of compact headlamps with built-in battery is proof of that. My experience of talking to those who use such small things shows that they are quite satisfied even with such relatively small brightness. And for their needs, the stock of brightness of such tiny things is quite consistent.

In fact, the Acebeam H40 lacks any functional deficiencies in relation to its size. IMO.

+ convenient UI with access to the extreme modes and blocking, stepless brightness control

+ HiCri version and a radically brighter version with a cold light.

+ compact size

+ affordable price for such a niche product.

+ stabilization and duration of work.

I like this thing and again feel that Acebeam did a great job with release of one more product. Bravo!

Edited by: Lumeniac on 10/25/2020 - 11:08
KeepingItLight
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Outstanding review!

Couple of use cases:
1) gifts to friends who are ignorant of Li-ion, and
2) emergency light stowed in a vehicle where you want AA-compatibility

 

264
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Nice review Narmattaru.

I was undecided about which single AA powered headlamp to buy. A few years ago I purchased a Fenix HL23. Very nice headlamp but I always had to replace the battery during long walks. So I passed on the new Fenix HM23 and just bought the Acebeam H40 with high Cri. Could not find any bad reviews for the H40 and I can have it set to about 100 lumens in memory mode unlike the Fenix products. Maybe I will just use it around the house and use my Nitecore HA23 or HC50 for long walks. Certainly will use the H40 for at least a couple long walks. Thanks again for the great review.

Lumeniac
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glad to read this

thanx

Pavlo
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Great review. Looks like a great headlamp with lots of value for the price.
The one thing it seems to be missing is a proper moonlight mode. 5 lumens is much too bright for night adjusted eyes.

Atreides
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I appreciate the review! Your feedback about this light is one reason why I ordered one (will arrive tomorrow). I wonder if a TIR lens for a Convoy S2+ would fit? The dimensions of the lens are 19.5mmx 12mm.

Thanks again!

“May it be a light to you in dark places, when all other lights go out.”
― J.R.R. Tolkien, The Fellowship of the Ring

Lumeniac
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glad to read this. 

i have no idea about modding, never, actually was into it. 

treellama
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Just from eyeballing mine, it’s not long enough to fit an S2+ TIR.

Grigio
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Nice compact headlamp. I just wish that the headband itself, like so many other brands, is not completely covered with their name / logo. I would feel like a walking billboard. They should pay us to advertise their brand. Sick

Atreides
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Narmattaru wrote:

glad to read this. 


i have no idea about modding, never, actually was into it. 

No problem! I’m not a modder myself. I got the light today and it’s amazing! The tint is superb (to my eyes) just like you described. I have an Emisar D4S SST 20 4000K on the way and I hope the tint/color is just as good! Thanks again for helping me decide to get this, might even get another so I have a spare! Big Smile

treellama wrote:
Just from eyeballing mine, it’s not long enough to fit an S2+ TIR.

Thank you! You’re absolutely right – too long and too wide. Sad

Grigio wrote:
Nice compact headlamp. I just wish that the headband itself, like so many other brands, is not completely covered with their name / logo. I would feel like a walking billboard. They should pay us to advertise their brand. Sick

Agreed! LOL

“May it be a light to you in dark places, when all other lights go out.”
― J.R.R. Tolkien, The Fellowship of the Ring

slmjim
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I'm really partial to AA lights due to the ubiquity of the cells. After seeing this review & much other really good feedback about the H40, I decided to get one onfthe SST variants for use in the shop & garage, and general around the house tasks.  

Because I've been so satisfied with it, the H40 has taken up residence next to my much-liked YLP Panda high CRI headlight.

The YLP gets noticeably warm on my head at higher outputs on long runs.  Not unexpected.  It's also much more floody than the H40.  As I almost never run AA lights on 14500's, the H40 has barely warmed at all on H running NiMh cells.

So, I use the Panda for arms length out to 10 ft. or so tasks.  I use the H40 for close-in, seated-at-the-workbench or under the hood type work.

Both lights are a real pleasure to use for their respective applications.  Both offer tints that are comfortable for me. Both are terrific values in their market niches.  Not the least expensive in each category, but top-drawer expressions of practical, simple & robust budget headlights.

 

slmjim

Great... Carnac the Magnificent tells me I just signed up for yet another expensive hobby.

Smile! It makes others wonder what you've been up to.

Pavlo
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Anybody know the circular diameter of the stock MCPCB? Wondering if the light will fit a 16mm MCPCB.
Thanks

thefreeman
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Got that one yesterday, they only had XP-L cool white but that’s ok I planned to swap the led anyway, still I was baffled when I lighted it up, it’s green, not white Facepalm

low : CCT = 4922K Duv 0.0209 Ra = 64.8 R9 = -65.2
~mid : CCT = 4966K Duv 0.0197
high : CCT = 5000K Duv 0.0187
turbo (li-ion) : 5089K Duv 0.0167