[Review] 77 Outdoors D25 Headlamp (18650)

Other Types of Lights LED Headlamps
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The only advantages of using 2 leds, with a limited amperage driver, is slightly better efficiency and slightly higher output. Let’s say the driver has a 3A limit. A single xml2 running at 3A is let’s say 1000 lumen. The same led running at 1.5A is 600 lumen, not 500. LEDs are more efficient at lower power levels.

So if you have only 3A total, a twin xml2 light can output 1200 lumen (2 leds running at 1.5A each) instead of 1000 lumen. Higher total output and better efficiency.

So 2 leds are better, but there are downsides as well. The special oval shaped mcpcb makes it hard to swap a new led in. If you reuse the oval shape mcpcb you are forced to reflow new leds on it which is harder to do and your limited to 5mm leds.

In my opinion, I’d rather have the D10 with its single led. It’s far easier to swap in a new led and round mcpcb just by soldering 2 wires. I can use whatever 3v led I want. (I chose a very nice tint with good color rendering) It’s also easier to swap in a plastic optic to replace the reflector. I really don’t mind the small loss of efficiency and brightness as I rarely run the battery fully down or use max brightness.

So it’s up to you to decide what’s more important as to which model is best for your needs.

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http://www.latticebright.com/En/cpzs/cpzs1.html

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For anyone interested just get the Sofirn D25S which they have installed SST-40’s and updated the firmware.

On/Off - Single click
Hold - Stepped levels - Release and hold within 2 sec changes direction
Double click - Strobe, Beacon

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does it focus correctly with sst40?

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I got 5pcs and all of them look great, all centered perfectly. Doesn’t look anything different than any other light using a SST40 and smooth reflector. Nothing that annoys me.

Solid deal for this price point

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both of mine have very poor beam profile, due to leds not focusing correctly, mine have l2 leds

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Have you tried raising or lowering the reflector heights to improve focus?

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nope, i was planning on replacing leds, and reflectors, got them from kai, deeper reflectors, leds, and spacers, but did not get to it yet.

mine came with xml2 clones, maybe with actual xml2 leds, or other leds, focus would be correct, idk, but in my case, out of the box it is pretty lousy, as far as beam profile, it does illuminate, and vast majority of people would not even notice it, but we are “special” here, lol

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fixed the issue of a donut hole, i replaced leds with xpg3 on 16mm mcpcb, and centering gasket, got leds and gasket from kaidomain, reflectors left stock, due to ticker mcpcb had to put a gasket under lens holder\cover, about 1mm, i used silicone rubber from iphone holster. now beam is much better no holes, and it seem narrower. i also got rid of cold\blue oem leds, xpg3 are 4000-4500k, according to kaidomain, (i guess that means a tint lotto) i like the light much better now,

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I just bought one, seems decent. I am a mechanic so I thought it would be useful while under a car, but I am concerned that I could break the holder on the band, anyone know where to get replacements for those?

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You can’t get replacement holders. You can either buy the rubber universal types or print yourself a new one. People have the data and will share.

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VERY cool! I did not know there were universal rubber ones! Any chance you have a link handy? I like to be prepared ahead of time.

Also, I took mine out in the dark tonight and was pleasantly surprised. I have a Thrunite TN12 as part of my EDC. Although a different tint, they were very comparable. I did note the cheap feel of the threading on the battery cap, and hope I can get away with charging more often than replacing the battery in it. Overall extremely happy with the purchase.

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There a lot of universal ones like this for $2.

#Aliexpress US $1.94 31%OFF | Headlamp Headband head Belt head Strap Mount Holder for 18650 Headlight Flashlight Lamp Torch

Some are higher in price and might be better quality. You can also get the ones with the extra strap over the top.

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I got one to have as a spare, thanks so much!

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Does anyone with the D25S have issues when using click and hold to cycle high to low? Any click or click and hold just cycles from high to low and doesn’t want to cycle low to high unless turned off.

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I thought the D25S had the same UI as the D10. On the D10 it only cycles from high to low and never the other way around.

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I have the same UI as Funtastic. It’s not really a bother but it does have memory mode so it would be nice to go down when in the medium modes rather than cycle through high. I also can’t seem to go down in modes immediately after turning it on. Just seems like a weird behavior. Though at it’s price I can’t really complain much. I knew I should have gotten more than one Quadrupel driver :person_facepalming:

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You need to be aware that there is a feature in the UI that gives you the ability to jump to high if you click within 3 seconds of turn on.

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Oh ok I think I get it now. Thanks. Though mine is just within a second. The timing seems to leave little room for error on mine. I guess I’ll just use L-H cycle to avoid frustrations.

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Today I modded all my 3 Headlamps.

with 2 Anduril Drivers from Quadrupel and one Attiny 412 from gchart. The second Attiny got a broken leg after some problems with a short causing the LED was always on.
But finaly all 3 Headlamps has ramping with Ramping iOS or Anduril.

I had two Drivers with Ver03 and one with Ver01, so the Ver03 got the Attiny 412.

Thanks to you both.

I changed the LEDs too:
2x LH351d 2700K + 5000K 90CRI
2x XM-L2 NW (3B or similar)
1x SST40 5000K

Drivers and Flashlights from recent posts for reference: