Hi guys,
what headlamps do you know, that are able to maintain 1000+ lumens for one hour or longer ? Other than the Acebeam H30.
I think the issue with 1000 lumens headlamp is that to sustain 1000 lumens on a “headlamp” size light will make the flashlight very hot (unless one is OK with a HOT light on his forehead…)
I don’t think a 1000 lumen light should get all that hot. I use a XML-T6 LED flashlight that is rated an honest 950 lumens with the CREE XML-T6 bin. My cheap Boruit 3 LED headlamp rivals the output of the flashlight and will run for hours on two Panasonic 3400 mAh 18650 Li-ion batteries. Buy one and use good 18650 batteries and it should meet your requirements. A single light with the T-6 LED should almost put out 1000 lumens even though the Chinese sellers will rate them at ridiculous lumen counts.
If you get one with the XM-L2 LED it should be good to a bit over 1000 lumens.
I think the Zebralight Fw600 series lights might be a good contender. No?
Zebralight h600 series will probably overheat and step down unless used in very cold weather. I personally find 500 lumens from an xhp35 appear far brighter than 1000 lumens from an xhp50 or xhp70 in the same sized reflector. Beam profile is almost more important depending on use.
All that aside, you should check out Lucifer headlamps. They make quality multiple LED headlamps that are designed to sustain a high output for real world use.
Majority of other headlamps might hit an initial high lumen rating in the first few second, but step down significantly after 30 seconds and often have poor regulation in the highest modes.
The only Headlamp I know that can dissipate the heat of 1000 lumen for 1h and also have battery big enough to provide this amount of energy is Scurion but it is big, heavy and EXPENSIVE. you can add to it an additional heat sink to improve heat dissipation
Acebeam H30 can hold 1000lm during about 1:30 using 18650.
It is big headlamp with efficient driver and top bin xhp70.2
It is most efficient headlamp in terms of lm*h I know
Is it 4500mAh 18650? :), I think you meant 21700
No. 18650. You can calculate power consumption of top bin xhp70.2 powered by driver with 90% efficiency at 1000lm+dissipation on reflector.
It works more than 2:30 at 1000lm with 21700
Armytek Wizard PRO? Nitecore HC35? Thrunite TH30! 123g without 18650 battery, like x3 Zebralights!! 
Notice Acebeam using bigger and heavier 21700 battery so at the end weight is similar. But Thrunite cost only 65$ ;))
No L-shaped headlamp can hold 1000lm because of overheating.
Here heating of h30
Here heating of l-shaped headlamp
WOW I had no idea xhp70.2 is almost 2x more efficient than xml2, how did I missed it
Reviews have shown that the turbo mode of Armytek Wizard and Elf-C2 will step down to about 500lm.
wow! Amazing! can you test the Firelies PL47 V2, it has bigger head than any other headlamp so far…but, it quad-led built, has 2500 lumen max for sst20. I think, if Fireflies use this host for 1x led, then it would sustain the heat dissipation. guessing though.
I have photo for V1. Don’t think there is big difference.
Threads always have big thermal resistance.
Yeap, its strange solution to place SOS in main loop, Thrunite have overall good UI but needs some improvement.
My review here with some graph (in russian but g.translate can help )
i agree with AEDe
the ONLY model that can sustain something around 1000lumens is Acebeam H30
i reviewed some stuff that were alike in max brightness, but stepped down to lower level due to worse heat dissipation
i must mention that in real life 1000 lums is far above leve that you normally need from headlamp. in lots of situations you can do with like 100-200, when it`s about close range works
The ONLY Acebeam H30 ....and Thrunite TH30 :D and maybe some others.
Actually, lots of others, including some that will do 5000 lumens for more than an hour. For example, Mila Vega 5000, LedX Cobra 6500, Lumonite Leader 5000, Lupine Betty (5000), Lucifer X (5000)
Used for sports like orienteering:
