Hello
I’m looking for a “small” 21700 light that Can sustain 1200 to 1600lm for 10min
Convoy s21d 519d sustain 1200lm 60+min
Emisar DT8 sustain 1500-800lm for 5min
Emisar D1 sustain 1600lm for 5min
I bought the convoy m21b to test this small host with great fins !
I dont mind ui type (anduril or 4 steps )
I want something small like 32x125mm
Any idea please ?
You’re fighting physics a bit.
Go cheap on light and cells so you can toss them / cells as they burn up.
The Convoy M3-C can do it, 1500 lumens on 40% till the battery is dead but its a heavy, chunky light
Well put.
i know i know…Watts are what we are dealing with
but depending on the LED efficiency and host mass/fins design it can be very different.
i was interested with copper fins design like D4KTi but reviews are very bad…
The only good results is the one from M21B with 1600lm for 25min !
But i was looking for something more floody
Zebralight SC700d
S21D can sustain 600lm. There is no way it can do 1200lm for 60 min.
i would highly dispute some of those claims unless you are using them in -20C ambient conditions. S21D 519A is more like 700-850lm at 10mins. DT8 SST-20 750-800lm at 10mins (at 55C temp max). Acebeam E70-AL with XHP70.2 or Olight Seeker 3 Pro can sustain approx. 1200 lumens, but are only 70CRI.
I wonder if a small 18650, like an X6, could be equipped with an LD4 6A driver set at the lowest (4A?) and running an LH351D in constant current mode might do well for these requirements? Perhaps with a 3500mAh cell?
I have some X6 hosts en-route, LH351D 5000K 90 CRI emitters and a 6A LD4 on hand… will set it up and test it when the X6’s show up.
Putting dc-fix on the front element makes any flashlight floody. It’s cheap, easy to do, and completely reversible. It cuts down slightly on the output, but not enough for it to matter for most applications. Worth a look if the M21B does what you need it to do, and the only problem is it’s not floody enough.
Jetbeam TH20 claims it will do 1500 lumens for 2 hours. I have the first generation 18650 only version of that light. I never timed it but it seems to run a long time and not get overly hot. I will throw a fresh battery in it, break out the light meter and see what I can come up with.
Sorry If I repeat some model already mentioned above.
Also, some of them might be too big. I removed the abviously too big ones from the list:
Take it outside in the winter when it’s a few degrees below freezing with a little wind and they all sustain 1500lumens for 10 minutes.
On old XM-L Convoys before there was temperature regulation i used to dunk the head in water or run it under a faucet when it got too hot.
Surprisingly it would cool it down in less than 5 seconds.
How about the Wurkkos TS22?
It fits the size requirements and
can sustain more than 1000 lumen.
Here is a review: ➤ Runtime \ Beamshots \ Review Wurkkos TS22 (21700, XHP70.2, Type-C)
My first two X6’s arrived. Driver bay is 22mm instead of the usual 17 so I’ll have to get a lil crafty, but for this I think it will be fine. Might have to machine a 17mm to 22mm adapter, we’ll see.
Works everytime. That’s how I play mobile games lol
thanks NightTime for the links ! i like the EA01 Astrolux and Wuben A21 without cooling sustain a lot…
which one is the X6 host you talk about ?