[Review] 77 Outdoors D25 Headlamp (18650)

I see people assume this a lot. Cree lists +–7% which is a potential 14% difference within a single bin. I guess they try to stay within 7, but allow 3.5 extra on each end just to cover themselves.

The bottom line is it’s probably about 7% like you said. Just thought I’d mention it.

I was talking about different 7% and missed this one. :wink:
You’re talking about “Cree maintains a tolerance of ±7% on flux and power measurements”.
I was talking about bin width, f.e. T5 is 260-280 lm (7.7% width) and U3 is 320-340 lm (6.3% width).

So…there’s even more variability than I listed above.

They has XP-Footprint and I think they are no genuine Cree LEDs.
They looks similar to XP-L LEDs.

i’m pretty sure those are LB leds, not cree

The Sofirn SP40 driver is also unregulated. Brightness decreases as the battery runs out.

Strange. It must vary from source to source. Mine had the 5050 (XM-L2) footprint:

Thanks for the correction.

Yes, that is correct… the SP40 is unregulated

I got my first D25 from 77Outdoor on Amazon and they clearly stated in their ad at that time the emitter was Cree-like and confirmed in an email that they were not Cree. Since that time their D25 model has been updated to SST-40 (similar to the Sofirn D25S offering.)

However the D10/D25/D20 based headlamps are apparently offered by many different vendor house brands and the emitters used by each may vary.

There seems to be more consistency with the Sofirn and/or Wowtac headlamps but that’s my assumption.

You are right, I checkt my lights.
The older one, with the driver-pics in this thread has XP-LEDs. This is from Xanes, ordered from Banggood.
The newer from Aliexpress has XM-L2 - Style LEDs, with “LMP” written on the LED.





Yeah, thanks for the info. It really seams that (I guess even for a fake XM-L2?) this D25 headlamp keeps up with the sofirn pretty decent for the first 2 hours (judging by the run time/output graphs)? Am I right? Does having 2 of the LED’s over just the version with 1 actually make it brighter? I was thinking about getting the single LED with the zoom feature, but I want more brightness over zoom.

Never heard of LB.

Really great information from everyone.

I assume that these are still pretty great to have for the price and come close to wow and sofirn, so I have 3 choices; Sanyi D10, Boruit D10 & Sanyi D25

What do you guys thinK :question:

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.

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

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

does it focus correctly with sst40?

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

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

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

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

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,