Does anyone have or have knowledge of the Nitecore Nu53? It claims 1300 lumens for 9hrs with no stepdown… I’m struggling to believe this and would love some real user specs if possible please.
It would have to step down in brightness unless it can defy the laws of physics.
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Don’t expect this light to still emit 1,300 lumen after 9 hours.
- Being a lightweight light, the temperature will rise fast, and the electronics will throttle it before it burns your forehead.
- The specs are to be read differently. After turning it on on max, the light will still emit 130 lumen (10%) after 9 hours. (and even then I would say: well that’s what they claim)
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400lm for 9h with 6000mAh batt. possible…
From datasheet:
Looks like it have poor stabilization… ;))
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Ah so it looks to be struggling to maintain it even within the first hour 
I’m so tired of all of these manufacturers and I mean all of them just about ( besides arguably Zebralight) and their lies and overstated runtimes.
Black diamond company is the first one that started pissing me off with their runtimes years ago.
Their 2 x AA headlamps say they can run 36 hours when in reality their headlamps cannot do that on almost ANY brightness setting besides maybe 5 lumens.
Zebralight is the only brand that comes close to their stated runtimes, even though they lie a little too. I’ve tested my Sc600w on a 180 lumen setting and got 9 Hr 40 min, even though their site says 10 hrs or so. Their site say this light can do 500 lumens for 3 hrs, I got 2 hrs 15 min with a 3500 Sanyo cell.
Every other brand I’ve ever used in the last 15 years lies somewhere between 5%- 50%.
I knew that Nitecore headlamp cannot sustain not only 1300 lumens, but even 500 lumens for 9 hours straight, cause not even my zebra light can not do that.
Zebralight sc700 can do 500 for 4 hours with a 5000 mah battery, which means that nitecore cannot possibly run almost twice as long with only 1000 mah extra capacity.
I’m so tired of not only of their bs, but everyone’s bs.
That ansi fl1 crap needs to be done away with.
Everything should be tested like the zeroair and 1lumen reviews guys do.
Real runtimes.
I’ve noticed even Fenix is now doing the same bs.
Claiming 18 hr runtime at 400 lumens with a 5000 mah cell.
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Yes, brightness depends on type of led , heat dissipation, optics and power output. Runtime depends on battery capacitance and driver efficiency. To know real specs you have to know all of this or real life test will do. Just do not buy without real life test - review.
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That runtime graph is the funniest I’ve seen. The axes are not linear and they’re not logarithmic either, just compressed however they want. That initial drop down from 1300 is probably nowhere near 20+ minutes either.
I wouldn’t worry about it being 10% off since I see that much variance between the reviewers like 1lumen and zeroair.
Many expensive lights that do orienteering headlamps seem to do better, maybe in part because they compete with each other. LEDX claims 2000 lumens for 1:30 on their Snok model and independent testing verifies it:
Lumonite has the best presented runtime graphs I’ve ever seen on their website. Put your cursor on the graph and it will tell you the lumens and minutes at any particular time. For example:
Headlamp LUMONITE Navigator2, 4195 lm
Lucifer rants about ANSI FL1 on the website (and sometimes in posts on candlepower and mtbr). The owner uses 70% initial as the runtime spec (instead of 10%), which, since the lights are regulated is pretty much the same as when they fall off 100% the initial value. I did see a runtime graph once there, but no independent testers. I like that they step down after no longer being able to hold a setting like the Lumonites and don’t leave you in the dark. (Disclosure, I’m ordered last week a Lucifer L+ after following them on forums for a decade.)
Lucifer headlamps | Technology - battery life
Older L model:
Lupine also looks like they use realistic runtime specs (and they should for the price), such as 1:15 at 2100 lumens for the Piko using the 2x18650 3.5Ah battery pack.
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Do you have the lumonite lamp? Or do you have links to someone who has done runtime tests and so on the 1000 lumen mode?
I’m highly skeptical that the half plastic headlamp can maintain 1000 lumens for the claimed 13 hours.
Something tells me it can hold 1000 lumens for 10 minutes b gore stepping down to 300 lumens for the next 10 or so hours
Why not. Big external battery and cold environment.
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No, I don’t own the Lumonite, but take a closer look at the pictures. That’s a very wide, palm-sized piece of aluminum with large fins and a plastic lens in front. The plastic is a small part of the mass.
If they faked the runtime graph, they really out did themselves varying the lumens minute to minute 3626, 3627, 3625, 3621, etc. labeling it fan_status_on, conservatively rating it 3500+ when it maxes out at 4195 and holds 3620ish steady. It looks like a real graph from testing to me.