FREEME ✌ Nightwatch NS59v1 9*SFQ55 28000lm 2*21700 Flashlight Group Buy - ALIVE

257 posts / 0 new
Last post
Sirstinky
Offline
Last seen: 13 hours 2 min ago
Joined: 11/02/2018 - 17:07
Posts: 1590
Location: Vancouver, WA

Nice review. Still working on mine! Have 5 other lights to test currently! Stand by for the Wuben A1 up next.

Bungle88
Bungle88's picture
Offline
Last seen: 4 weeks 1 hour ago
Joined: 02/16/2016 - 09:45
Posts: 77

Interested Thumbs Up

BEARS ARE PEOPLE TOO
BEARS ARE PEOPLE TOO's picture
Offline
Last seen: 1 week 6 days ago
Joined: 03/28/2016 - 02:22
Posts: 100
Location: United States

Interested.  Does the code not work anymore?  I'm not getting $67.47

B E A R S

tactical_grizzly
tactical_grizzly's picture
Offline
Last seen: 3 hours 39 min ago
Joined: 11/08/2020 - 14:54
Posts: 678
Location: North Texas
BEARS ARE PEOPLE TOO wrote:

Interested.  Does the code not work anymore?  I’m not getting $67.47

Great username. I love it.

BEARS ARE PEOPLE TOO
BEARS ARE PEOPLE TOO's picture
Offline
Last seen: 1 week 6 days ago
Joined: 03/28/2016 - 02:22
Posts: 100
Location: United States

Big Smile

B E A R S

ArcticShadow
Offline
Last seen: 1 week 6 hours ago
Joined: 02/08/2022 - 04:30
Posts: 4
Location: Columbus Ohio, USA

My Light after less than 1 month flashed and started smoking from both sides, emitter end and battery end, 2 LEDs are burned. light doesn’t work.

Such an amazing light to use. I just hope I can get a replacement.

2100
Offline
Last seen: 1 month 5 days ago
Joined: 05/28/2011 - 10:28
Posts: 4612
Location: SINGAPORE
tactical_grizzly wrote:
I’ve just posted my full review of this beast. It’s AWESOME for the price.

Thanks for the review.
On TB it is advertised as 30k lumens, which is ok since their integrating sphere + meter does show nearly 30k at turn on and dropped to just below 25k @ 3 seconds.

So i guess we need to bear this in mind when comparing numbers between the few camps. Just take a large part of it as the OTF lumens vs emitter lumens thingy as well. Maybe 15%? hit?

But in real life usages, that is already more than fine enough, already more than sufficient output for the mass of the host. Law of diminishing returns, even for few seconds hotrod usages.

Quote :
How does it compare to the official specs? 22,800lm is lower than the claimed 28,000lm, but not so much lower that you’ll actually notice. That 28,000lm number could be “theoretical” lumens (the output before losses from the optic/reflector & lens). It’s still very bright. Candela of 98,500cd is similarly falling short of the claimed 130,000cd. With that said, it’s still blistering performance.

2100
Offline
Last seen: 1 month 5 days ago
Joined: 05/28/2011 - 10:28
Posts: 4612
Location: SINGAPORE

ArcticShadow wrote:
My Light after less than 1 month flashed and started smoking from both sides, emitter end and battery end, 2 LEDs are burned. light doesn’t work.

Such an amazing light to use. I just hope I can get a replacement.

Whoops second report of magic smoke.
If i am not terribly wrong from what i read on TB, it is directly driven on Turbo.

That’s the “fun” with these budget lights, you’d never know what you are getting after 1-10 weeks of usage. To be far, more branded lights also suffer the same fate sometimes, maybe a little less common.

My first DD light was the DRY triple xm-l driven with 3 18650s around 1 decade ago. Can’t remember how i measured it but i deduced each emitter/cell was doing around 4+ amps range, with good unprotected cells of course (the PCB itself has resistance). During that time there were very few high amps/high drain cells, if any. And the few of us here then in BLF was afraid of the same magic smoke. But still, compared to today’s specs, that’s nothing, be it host mass, heat or the electronics. lol Big Smile

2100
Offline
Last seen: 1 month 5 days ago
Joined: 05/28/2011 - 10:28
Posts: 4612
Location: SINGAPORE

My advice to other users….. take it easy on the turbo mode. Don’t even rely on the 30 seconds turbo timer. And don’t spam turbo, not even 10 seconds, when the light feels like > 45 deg. Not for the LEDs, but more of for the electronics.

Also, i have this feeling that even at 2000-4000 lumens average usage and the light is 40-50 deg range and heat soaked, do not even attempt to go into Turbo. This feeling is from my experience from other budgetlight previously.
Run it under some dripping water for 15 seconds, it’d help heaps. If you are in winter conditions then that’s great, but it’s the tropics here.

tldr – take it easy, just a hobby/fun light.

tactical_grizzly
tactical_grizzly's picture
Offline
Last seen: 3 hours 39 min ago
Joined: 11/08/2020 - 14:54
Posts: 678
Location: North Texas
2100 wrote:
On TB it is advertised as 30k lumens, which is ok since their integrating sphere + meter does show nearly 30k at turn on and dropped to just below 25k @ 3 seconds.

What’s ”TB”?

2100 wrote:
So i guess we need to bear this in mind when comparing numbers between the few camps. Just take a large part of it as the OTF lumens vs emitter lumens thingy as well. Maybe 15%? hit?

I believe the rule of thumb is a 20% loss from emitter to OTF due to the reflector or optic and the lens. It’s good to keep in mind, particularly buying from makers who are less likely to do actual lumen measurements. The big brands, like Olight or Streamlight for example, will usually do actual OTF lumen measurements. Smaller makers, like Convoy for example, will just do a calculation based on LED testing data of how much brightness the LED should be producing at the given drive current, then they will list that as the lumen specification. There is no substitute for real OTF lumen measurements but theoretical output is better than nothing.

2100
Offline
Last seen: 1 month 5 days ago
Joined: 05/28/2011 - 10:28
Posts: 4612
Location: SINGAPORE

tactical_grizzly wrote:

What’s ”TB”?

I believe the rule of thumb is a 20% loss from emitter to OTF due to the reflector or optic and the lens. It’s good to keep in mind, particularly buying from makers who are less likely to do actual lumen measurements. The big brands, like Olight or Streamlight for example, will usually do actual OTF lumen measurements. Smaller makers, like Convoy for example, will just do a calculation based on LED testing data of how much brightness the LED should be producing at the given drive current, then they will list that as the lumen specification. There is no substitute for real OTF lumen measurements but theoretical output is better than nothing.

TB = Taobao. Big Smile

Yeah i have the same “issue” with the JKK76 from Jinheng. I put quotes coz i already know those numbers need to be verified as so it’s not an issue esp for the price, it is what it is, and there is a good chance that i gotta deduct as much as 30%, so do not have any high expectations before getting the light.

In the end i measured, at best, 26-27k OTF lumens range, and maybe 24-25k OTF at worst. It’s not the cells also as i tried with 40T, Lishen 2170HP and 2170LA…for eg 1 pc 2170HP gives me 1400 raw value on the meter while 40T gives 1200 and 3pcs 2170HP gives me 2500 and so does 40T and 2170LA which gave 2500), it’s the driver (it’s not DD on turbo).
But of coz then again, it’s just a ceiling bounce (not even lumen tube) vs quite well known/measured lights like BLF Q8/Sofirn Q8, so i cannot say that my measurement is anywhere accurate as well.

But that is fine, coz it is indeed running very hot in my book already, despite the 50% higher mass than this NW Chaos, the JKK76 is 500g empty, 700g with cells. And my expectation is already just 1 single less than 30s turbo burst and that’s it….not high at all. The emitter efficiencies is in the same ballpark basically.

I was originally expecting 35k to 40k OTF range, coz i thought the JKK76 was DD. But i don’t think that is feasible at all, too much heat (due to the efficiencies involved, this aint Cree) even if the cells can support 1 or 2 bursts.

freeme
freeme's picture
Offline
Last seen: 44 min 18 sec ago
Joined: 11/14/2013 - 22:00
Posts: 11059

OP coupon still valid.

1thedeals.comyoutubeAstroluxNealsgadgetsolight

Sirstinky
Offline
Last seen: 13 hours 2 min ago
Joined: 11/02/2018 - 17:07
Posts: 1590
Location: Vancouver, WA

ArcticShadow wrote:
My Light after less than 1 month flashed and started smoking from both sides, emitter end and battery end, 2 LEDs are burned. light doesn’t work.

Such an amazing light to use. I just hope I can get a replacement.

My review light has a slightly burned LED after only about 7 hours of use, mostly runtimes. The price you pay for extreme output in a small host. You can only push physics so far within certain limits. 20 mm driver pushing almost 300 watts with only 350 grams of thermal mass is asking A LOT.

Chinaheart
Chinaheart's picture
Offline
Last seen: 15 hours 5 min ago
Joined: 07/19/2019 - 22:56
Posts: 333
Location: Philippines

Interested for stainless bezel

 

freeme
freeme's picture
Offline
Last seen: 44 min 18 sec ago
Joined: 11/14/2013 - 22:00
Posts: 11059

 

Please help yourself.

 

Group Buy Price: from $68.22 (usual $90.95)

Freeme's Exclusive Coupon:  1TDNEW 

 

More DetailsProceed to Store

 

Chinaheart wrote:

Interested for stainless bezel

 

1thedeals.comyoutubeAstroluxNealsgadgetsolight

ek9cv5
Offline
Last seen: 1 day 22 hours ago
Joined: 01/17/2013 - 02:56
Posts: 29
Location: Us

Looks like the aluminum bezel is out of stock. Any idea when they will be in stock again? Thanks

Pages