ALL FREEMEšŸ€ x 1THEDEALS Group Buy >> HOT āœŒ EC01X/ EC07/ ED01/ EA01/ LT2 āœŒ

Whatā€™s ā€TBā€?

I believe the rule of thumb is a 20% loss from emitter to OTF due to the reflector or optic and the lens. Itā€™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. :smiley:

Yeah i have the same ā€œissueā€ with the JKK76 from Jinheng. I put quotes coz i already know those numbers need to be verified as so itā€™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. Itā€™s not the cells also as i tried with 40T, Lishen 2170HP and 2170LAā€¦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), itā€™s the driver (itā€™s not DD on turbo).
But of coz then again, itā€™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 thatā€™s itā€¦.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 donā€™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.

test

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.

Interested for stainless bezel

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

There seems to be version 2 now with SFQ60.3 leds.

Are there any reviews for this v1 or v2?

I have read at least one v1 review. Canā€™t remember excactly.

Theres also a V2 of the NS73 with SFN55.3. It claims 17500lm as opposed to 14500lm for the V1. Iā€™m not sure if I believe that it will be 3000lm more since the V1 is already extremely bright for a single cell light.

Has anyone also had their NS73 LED burn up or is it just an issue with the NS59?

Hi freemee, please send me the code if itā€™s still available.

Does the code work for the ns59v2?

Thanks.

Yes.

Interested

It is the same code as the one published in OP.

Still available.

Still waiting for the one I ordered to ship. Itā€™s been 36 days. I havenā€™t been able to get any info on availability. Order #27408
I had a different order from them ordered the same day, ship the next, and arrive in less than a week. Not sure if I should wait or try cancelling at this point?

I asked Neal to check for you.

Much thanks, he got right back to me. He said still need to wait 7-10 days. Weather is getting cold and Iā€™ll need this as a hand warmer.

I received notice yesterday it was shipping. I ordered 10/24 for reference. A long time to wait, but Iā€™m just glad to get it. Iā€™ve always been happy with the shipping speed once it gets shipped. I had 2 other lights I ordered on the same day in my hand in a week or so.

Received the light today. Wow is this thing a bright flooder. Iā€™m running it on Samsung 30Ts with button magnets. Iā€™m sure there would be a little less resistance with some solder blobs but this is fine.