I have two of them, and on one of them the green light on the button started to flicker and eventually stopped working after the first week or so. Not a big deal, still works great, and I love the Q8!
Lol sb, I thought you were replying to raccoon city. I thought, at first, you were talking about having two trolls. I really need to switch to decaffeinated coffee.
I have a question – how does stepdown act when in ramping: for example what does it do when it’s set to about half output and set to 5 miutes stepdown? what about thermal stepdown? I know it steps down on turbo according to settings, but what happens at lower levels? Thank you!
Location: A light beam away from the missus in the land of Aus.
So the new way to reduce the post count to reduce the srver work load is to delete members accounts?
I best start behaving. There was an issue with switch lights earlier on that from memory were fixed by reflowing the items on the switch board itself.
—
djozz quotes, "it came with chinese lettering that is chinese to me".
"My man mousehole needs one too"
old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".
Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.
I have a question – how does stepdown act when in ramping: for example what does it do when it’s set to about half output and set to 5 miutes stepdown? what about thermal stepdown? I know it steps down on turbo according to settings, but what happens at lower levels? Thank you!
At half-output, I don’t think it will step-down at all. If more than that, it will step down to about 50% output. For thermal stepdown, I don’t think it would do anything on lower levels because it won’t get hot enough. Though, I suppose if you calibrate it for thermal step-down at a very low temperature, it might drop down when it doesn’t really have to.
I just use the default 3-minute step-down, which seems about right for fully-charged batteries. When the batteries get to a lower voltage, it never really heats up much at all, since output is a lot less. So, maybe thermal would be a better way to go.
So the new way to reduce the post count to reduce the srver work load is to delete members accounts?
I best start behaving.
Yep. It’s SB’s world and we’re just living in it.
Seriously though, SB gives everyone a lot of rope. It’s very few people that are so disruptive and disrespectful that they actually hang themselves. Even then they sometimes are allowed to stick around. So if SB actually has to kick somebody out, you know they messed up big time.
MRsDNF wrote:
There was an issue with switch lights earlier on that from memory were fixed by reflowing the items on the switch board itself.
That was just a temporary fix that eventually failed. There’s a problem with the switch pcb and the through holes (vias). The only sure way to fix it is to swap to a different switch pcb.
—
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Very true. We are all given the benefit of the doubt here, by a large margin. Most of us respect that, or learn to. Only a few don’t, and then they go bye-bye. It keeps this forum a great place to learn, meet internet friends, kill time, and of course, spend some money.
Just got the Q8 and reading through the threads. Additional cells provide longer run-time?
WalkIntoTheLight wrote:
Alexium wrote:
So I’ve bought four Samsung 30Qs, and I’m underwhelmed at the Q8 light output compared to two and even one regular 5A Sanyo batteries that I’ve been running the light with previously. To be precise, I don’t see a difference between 2xSanyo and 4xSamsung 30Q. All fresh out of charger, of course. Also, I don’t see a difference between 4×30Q and 3×30Q. Should I be able to see it? I know naked eye is very poor at spotting small-ish differences, especially when comparing sequentially and not side by side.
You probably won’t see a difference in brightness between 2, 3, or 4 cells. You should definitely notice a difference at 1 cell, when it will only be about half as bright at maximum.
This is a bright light, at over 5,000 lumens, but don’t expect a blinding light. It’s equivalent to about 3 or 4 100 watt light bulbs. So, a fairly bright room.
Quote:
And a related question. As I ramp up the Q8’s output, at some moment just before the max brightness is achieved, it blinks shortly. Is it when it switches to direct drive? I don’t see a difference between the flat-out max mode, and the closest ramp-down mode (just before the light blinks). Do you guys see any difference there as you ramp your Q8 up?
The light blinks when it finishes the ramp to maximum. You won’t see anything when it switches from the linear driver to the direct drive, which occurs much closer to the low-end of the range. You can tell when you release the switch, though. If the switch blinks once, it’s using only the 7135 linear driver. If it blinks twice, it’s using the FET direct drive.
Just got the Q8 and reading through the threads. Additional cells provide longer run-time?
Yes. The batteries are in parallel so you add up the mah (milliamp hours). It’s the number of hours it can put out 1 milliamp. So one 3,000 mah battery (like Samsung 30Q) can put out one milliamp for 3,000 hours. 2 of those batteries gives you 6,000 hours. 3 gives 9,000 hours and 4 gives 12,000 hours.
—
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
@ Joey Adams……. You mentioned before you have two Q8’s… 1 stock & 1 modded by TomE. How much difference can you see in an actual side by side comparison of the two lights???
I am just assuming you have done this… if you haven’t please do if you don’t mind.
Thank you in advance!!
—
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
@ Joey Adams....... You mentioned before you have two Q8's... 1 stock & 1 modded by TomE. How much difference can you see in an actual side by side comparison of the two lights??? I am just assuming you have done this... if you haven't please do if you don't mind. Thank you in advance!! :THUMBS-UP:
I'm very curious as well. I assume there wouldn't be much of a difference to the eyes?!?!? Just guessing with that amount of light
Folks, got my Q8 today and top battery tube o-ring was caught in the threads when they screwed a light head onto the tube and it ruined the o-ring it is cut now. Contacted Thorfire and they told me to go pack sand, they do not stock or sell those o-rings. Banggood asked me canned question for the picture when I already included pciture of the issue, they simply do not even review. With that what o-ring do I need to buy and from where? Much appreciate the help. The price we pay to buy "budget" from budget sources
Folks, got my Q8 today and top battery tube o-ring was caught in the threads when they screwed a light head onto the tube and it ruined the o-ring it is cut now. Contacted Thorfire and they told me to go pack sand, they do not stock or sell those o-rings. Banggood asked me canned question for the picture when I already included pciture of the issue, they simply do not even review. With that what o-ring do I need to buy and from where? Much appreciate the help. The price we pay to buy "budget" from budget sources
Yes, installed that one but still would like to have two spares not just one. The top is the one that I will be untwisting often to re-charge the batteries, even with Nye 760G it will take some beating quickly. They put two o-rings for a reason. Given that there is no warranty on BLF Q8 not even 30 days warranty, it is not a terrible idea to have more o-rings in the bag. Plus they closed the light with the o-ring right in the thread at the factory. I think it was due to almost no lube on the thread, it was almost dry. I relubed with 760G.
ChibiM wrote:
dvzzz wrote:
Folks, got my Q8 today and top battery tube o-ring was caught in the threads when they screwed a light head onto the tube and it ruined the o-ring it is cut now. Contacted Thorfire and they told me to go pack sand, they do not stock or sell those o-rings. Banggood asked me canned question for the picture when I already included pciture of the issue, they simply do not even review. With that what o-ring do I need to buy and from where? Much appreciate the help. The price we pay to buy "budget" from budget sources
Folks, got my Q8 today and top battery tube o-ring was caught in the threads when they screwed a light head onto the tube and it ruined the o-ring it is cut now. Contacted Thorfire and they told me to go pack sand, they do not stock or sell those o-rings. Banggood asked me canned question for the picture when I already included pciture of the issue, they simply do not even review. With that what o-ring do I need to buy and from where? Much appreciate the help. The price we pay to buy “budget” from budget sources
@dvzzz……. If you need one right away or do not want to order them, go to an Auto Parts store & find one that fits. They usually have a very good assortment of sizes.
—
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
@dvzzz……. If you need one right away or do not want to order them, go to an Auto Parts store & find one that fits. They usually have a very good assortment of sizes.
I haven’t had much luck at auto parts stores. My local Ace Hardware Store keeps a lot more o rings on hand. The local places that carry the largest selection of O-rings by far are going to be hydraulic repair shops. If you live in a fairly large city there should be at least one shop that repairs hydraulics. They carry Master kits with every size and shape O ring imaginable.
—
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Small parts can be hard to find. I still haven’t found the M2.5 × 5mm brass screws for the little Q8 mod. Found them on Amazon but I don’t need 50 of them. I’ll keep looking.
—
Keep your nose in the wind and your eyes along the skyline.
Del Gue
@dvzzz……. If you need one right away or do not want to order them, go to an Auto Parts store & find one that fits. They usually have a very good assortment of sizes.
I haven’t had much luck at auto parts stores. My local Ace Hardware Store keeps a lot more o rings on hand. The local places that carry the largest selection of O-rings by far are going to be hydraulic repair shops. If you live in a fairly large city there should be at least one shop that repairs hydraulics. They carry Master kits with every size and shape O ring imaginable.
Man I have had great luck….. my ‘parts store’ just about has it all.
Of course it is not your basic generic run of the mill, chain parts store either……….. So if someone has only acess to this type ‘parts store’ & not the real deal…… those places Jason mentioned could be a great resource.
—
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Small parts can be hard to find. I still haven’t found the M2.5 × 5mm brass screws for the little Q8 mod. Found them on Amazon but I don’t need 50 of them. I’ll keep looking.
Check some of the Ebay links people gave, they had them in smaller quantities.
I’ll try to hunt up a link or two……..
Edit: Here is a link Bushmaster, I got some from this place.
Small parts can be hard to find. I still haven’t found the M2.5 × 5mm brass screws for the little Q8 mod. Found them on Amazon but I don’t need 50 of them. I’ll keep looking.
A troll recently had his account and all of his posts deleted.
That might be the problem here.
How to Post Images on BLF // Many knives for sale (USA only)
How to move a thread
I have two of them, and on one of them the green light on the button started to flicker and eventually stopped working after the first week or so. Not a big deal, still works great, and I love the Q8!
Budget Light Forum ...where Frugal meets with Flashlight!
Lol sb, I thought you were replying to raccoon city. I thought, at first, you were talking about having two trolls. I really need to switch to decaffeinated coffee.
I did to Joey Adams, until I got to “button”…..
… 
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
Budget Light Forum ...where Frugal meets with Flashlight!
I have a question – how does stepdown act when in ramping: for example what does it do when it’s set to about half output and set to 5 miutes stepdown? what about thermal stepdown? I know it steps down on turbo according to settings, but what happens at lower levels? Thank you!
So the new way to reduce the post count to reduce the srver work load is to delete members accounts?
I best start behaving. There was an issue with switch lights earlier on that from memory were fixed by reflowing the items on the switch board itself.
djozz quotes, "it came with chinese lettering that is chinese to me".
"My man mousehole needs one too"
old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".
Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.
At half-output, I don’t think it will step-down at all. If more than that, it will step down to about 50% output. For thermal stepdown, I don’t think it would do anything on lower levels because it won’t get hot enough. Though, I suppose if you calibrate it for thermal step-down at a very low temperature, it might drop down when it doesn’t really have to.
I just use the default 3-minute step-down, which seems about right for fully-charged batteries. When the batteries get to a lower voltage, it never really heats up much at all, since output is a lot less. So, maybe thermal would be a better way to go.
Yep. It’s SB’s world and we’re just living in it.
Seriously though, SB gives everyone a lot of rope. It’s very few people that are so disruptive and disrespectful that they actually hang themselves. Even then they sometimes are allowed to stick around. So if SB actually has to kick somebody out, you know they messed up big time.
That was just a temporary fix that eventually failed. There’s a problem with the switch pcb and the through holes (vias). The only sure way to fix it is to swap to a different switch pcb.
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Click this to go to signature links. I'm still around, just not reading many new threads.
Very true. We are all given the benefit of the doubt here, by a large margin. Most of us respect that, or learn to. Only a few don’t, and then they go bye-bye. It keeps this forum a great place to learn, meet internet friends, kill time, and of course, spend some money.
Yep… that last one you mentioned, “spend some money”; ‘can be’ a killer.
.
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
Just got the Q8 and reading through the threads. Additional cells provide longer run-time?
Yes. The batteries are in parallel so you add up the mah (milliamp hours). It’s the number of hours it can put out 1 milliamp. So one 3,000 mah battery (like Samsung 30Q) can put out one milliamp for 3,000 hours. 2 of those batteries gives you 6,000 hours. 3 gives 9,000 hours and 4 gives 12,000 hours.
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Click this to go to signature links. I'm still around, just not reading many new threads.
@ Joey Adams……. You mentioned before you have two Q8’s… 1 stock & 1 modded by TomE. How much difference can you see in an actual side by side comparison of the two lights???
I am just assuming you have done this… if you haven’t please do if you don’t mind.
Thank you in advance!!
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
I know I would have.
/\/\/\ … Me too!!
. 
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
I'm very curious as well. I assume there wouldn't be much of a difference to the eyes?!?!? Just guessing with that amount of light
The Eneloop 2005-2021 info thread
Folks, got my Q8 today and top battery tube o-ring was caught in the threads when they screwed a light head onto the tube and it ruined the o-ring it is cut now. Contacted Thorfire and they told me to go pack sand, they do not stock or sell those o-rings. Banggood asked me canned question for the picture when I already included pciture of the issue, they simply do not even review. With that what o-ring do I need to buy and from where? Much appreciate the help. The price we pay to buy "budget" from budget sources
Didnt you receive a spare one in the package?
The Eneloop 2005-2021 info thread
Yes, installed that one but still would like to have two spares not just one. The top is the one that I will be untwisting often to re-charge the batteries, even with Nye 760G it will take some beating quickly. They put two o-rings for a reason. Given that there is no warranty on BLF Q8 not even 30 days warranty, it is not a terrible idea to have more o-rings in the bag. Plus they closed the light with the o-ring right in the thread at the factory. I think it was due to almost no lube on the thread, it was almost dry. I relubed with 760G.
I’ve had no issues with my Q8 but I too would like to know the dimensions of the o-rings. Ya never know…..
Keep your nose in the wind and your eyes along the skyline.
Del Gue
http://budgetlightforum.com/comment/1304941#comment-1304941
Sorry for my bad English (gogole transtorla)
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
@dvzzz……. If you need one right away or do not want to order them, go to an Auto Parts store & find one that fits. They usually have a very good assortment of sizes.
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
I haven’t had much luck at auto parts stores. My local Ace Hardware Store keeps a lot more o rings on hand. The local places that carry the largest selection of O-rings by far are going to be hydraulic repair shops. If you live in a fairly large city there should be at least one shop that repairs hydraulics. They carry Master kits with every size and shape O ring imaginable.
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Click this to go to signature links. I'm still around, just not reading many new threads.
Small parts can be hard to find. I still haven’t found the M2.5 × 5mm brass screws for the little Q8 mod. Found them on Amazon but I don’t need 50 of them. I’ll keep looking.
Keep your nose in the wind and your eyes along the skyline.
Del Gue
Of course it is not your basic generic run of the mill, chain parts store either………..
So if someone has only acess to this type ‘parts store’ & not the real deal…… those places Jason mentioned could be a great resource. 
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
I’ll try to hunt up a link or two……..
Edit: Here is a link Bushmaster, I got some from this place.
https://m.ebay.com/itm/M2-M2-5-M3-Brass-Phillips-Pan-Round-Head-Cap-Bolt...
You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant
.................................. "Slow is Smooth, Smooth is Fast" ...................................
Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$
Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart
Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help??? TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal
From the 5 million page Q8 thread…
https://www.ebay.com/itm/M2-M2-5-M3-Brass-Phillips-Pan-Round-Head-Cap-Bo...
Is it possible to order a Q8 MCPCB separately?
Pages