BLF Q8 color and output measurements

Also checked the IR of the batteries at 5A, almost fully charged.

25R 23mohm
30Q 50mohm
VTC6 35mohm

So makes sense.

Why did a think the Q8 was a 6000 lumen light? Must have misread

BLF Q8 4x XP-L 5000LM Professional Multiple Operation Procedure Super Bright LED Flashlight

Yep…my bad

With good cells and clean tail screw holes it is higher.

I do not recommend it (I already know a case of putting one battery in reversed and the springs nicely acting as a fuse :wink: ) , but bypassing the tailsprings will give at least a 500 lumen bump.

I received my Q8s today

I can definately say, that in the tube screw holes its not residue from sand blasting

it is white glue securing the screws
even worse on my sample this glue was not even in the holes it was on 2 screw mounts also on the surface between the PCB and body

furthermore there was some black dirt on the drivers brass ring which I cleaned off with steel whool

On mine the tail screw holes were perfectly clean, no glue.

This was the only thing I found to be amiss:

Oh well, guess Thorfire wont be the next group buy manufacturer.

I’m not in any other BLF-flashlight team other than the Q8, but despite that it was quite an adventure with Thorfire, especially the communication, they have succesfully finished the Q8 project. They have more or less followed our design demands, did the part of the design that we as Q8-team were not capable of doing in a satisfactory way, stayed within the initial cost goal, and finally produced a light of which the specs are quite a bit better than we hoped for. To mention the most saillant detail: we never thought beforehand that Thorfire was prepared to make the massive copper DTP-board (that is central to the performance) we asked for.

So I believe that this BLF Q8 project in coopereation with Thorfire is as succesful or better than any previous BLF custom light project. A new project with Thorfire will certainly be a challenge again as far as communication goes, and they will certainly again struggle to get the details on the level of premium brand lights, but I’m confident that a next project with Thorfire could be succesful, and expect that if the Q8 project turns out to be profitable for them, the communication thing will only become better.

I agree, I’m overall very content with the result, especially at this low price. This is the first batch and I’m confident they will improve the minor flaws we found.

This is still the BudgetLightForum

The BLF Q8 is by far the most quality value SRK sized light with exellent performance and a low price

there are always minor issues with lights produced in China,
even big brands like

- Nitecore had problems with their drivers break physically the piggyback bord breaking off, have cheap non DTP stars

- Klarus with the disatster from dying drivers in the XT11GTs

  • you cant fix probems, because everything is glued

Most of us are expirience modders which are perfectionists that see small things that can be done better,
but in general this light works great even with those minor issues
and its easy to fix/clean the light center the reflector ect, nothing is glued or press fit

The light works out of the box and non specialists even do not recognize the minor QC issues the ligh has

If the side switch LEDs die its easy to replace them, many will insert another colored LEDs anyways

My first sample worked out the box, meets the specs, feels very well made and was cheap. What more could a BLFer want? As a hobbyist, the little QC things aren’t very serious and can be fixed easily, except for the switch light problem, but mine works fine.

Sounds like an unintended safety feature :wink:
That’s a nice little boost there

+1 on this djozz.
Also with the Millers amazing patience and abilities working alongside lots of members here far cleverer and smarter than I has really taken this forum to the next step in one huge leap.
If the Miller or anyone like him has the patience to keep organising projects like this the lessons learnt from previous experiences will only make future projects far better from which most of us here will benefit greatly from by having world class flashlights with leading edge firmware etc at a budget price.
The amount of work that is going on behind the scenes here by most of Millers team is incomprehensible.
These guys and gal do far more charity work here for us than Charity workers do themselves and at times with little thanks so the thanks they do get is warming to the heart especially after the months and months of tireless work when things dont go 100% to plan.
Thanks all involved in the projects and that includes everyone here that has commented on the good and bad things that has happened so far in making this place a new and exciting place to be and for making world class flashlights like nothing else in the universe. :slight_smile:

A most excellent post! I can't imagine the effort and patience involved. What a success!

Drops the mic…

Nice testing! Didn't realize the tint shift on low modes, using just the 7135 - that's strange...

Do this and you should get ~7,000 at start, ~6,500 at 30 seconds:

Notice I added solder on the rings around the screw holes? This is it ensure positive contact to bare shelves where the threads are located. The exposed rings (without the added solder) are actually lower than the surrounding solder mask so I don't see good contact there. Clean/sand those shelves, add light layer of NO-OX-ID. Who cares about conductivity of the screws (poor conductors anyway) when you have much better metal to metal contact from the screw holes to the battery tube. Also drill out the driver mount holes to 1/8", get rid of any burrs in all threaded holes, tail and driver mount threaded holes.

Tinning those rings helps make then do what they were supposed to do. It's also the shortest path from the springs (bypass in this case) to the battery tube. Also totally removes any need for conductivity through the screws.

Thanks for the tips. I’ve been following the Q8 threads and will do the simple mods and remeasure soon.

Solder, under good contact pressure, to bare aluminium, as with this mod, starts off pretty well for conduction, but longer term maybe less so, as oxidation perhaps creeps in. You could smear a small dab of some vaseline or battery terminal grease, or silicone grease on it first, as you would on the lead posts of a car battery, to keep the air out, and ensure it holds up long-term.

I do the same with crimp connections, being used to using “grease filled crimps” in critical aerospace applications.