Hello, i want to have strobe( flashing mode) in this light, which FW i can flash?
It would run cooler (a bit less lumen), that would be a benefit.
At a regulated current output, multiple emitters would actually be more efficient than a single emitter, thus giving longer run-time and/or higher output from the same cell. Around here, we usually go for the higher output side of that equation. But, you could set your D4 to the brightness level you’d expect from a single emitter, and get much longer run-time. The reason for this is that the emitters get less efficient as current goes up. With multiple emitters, they each will only get a fraction of the current.
If you look at the CREE PCT, you can see exactly what the difference is. For instance, with the XP-L2 W2, a single emitter at 3A would give you 1316lm and draw 9.6w total. But a quad using that same emitter would give you 1350lm at only 6.7w total power. And because both the voltage AND the current are lower, you would be getting higher output, longer run-time, and lower heat, which means also a longer, brighter “Turbo” mode. Really, the ONLY performance drawback of using a quad over a single emitter in the same space is the lack of throw from the smaller optic(s).
Thanks for the review!
i just bought my D4 with the XPL-Hi 5D, i’m wondering why the xpl-hi is $18 more expensive, i dont think there is that much difference in led prices
Yes, but lack of throw is my only reason to prefer a similar light with one LED.
D1 is similar to that, but its reflector is large enough to make it bad at close distance.
I want light that’s OK up close, but not a thrower. There is no Emisar like that.
OK. It seems like a D1 with optic instead of reflector would probably work for you.
I agree. I want something in between D4 and D1 with a better heat management.
D2?
A typical EDC light has a beam shape of about 8-12 cd/lm. Ish.
The Emisar line comes in ~4 cd/lm, ~33 cd/lm, and ~100 cd/lm.
None of the options fit the EDC beam style. That’s why I want a single-emitter light like the D4. It’d probably be the most useful variety for general purposes. Also, a single-emitter version should be cheaper and a bit smaller.
Probably Anduril. Or NarsilM or DarkHorse.
What is your definition of overheating? To hot too touch or damage?
As I remember the Q8 can run full on turbo. The lamp survived over 40 minutes. After 1h it starts to cool down.
Source: Q8, PMS SEND TO THOSE WITH ISSUES BLF soda can light - #9458 by The_Miller
Too hot to hold in a room-temperature environment without hurting one’s self.
these will run the D4 XP-L’s for 15-20 seconds on TURBO before triggering the thermal protection set at 65 degrees. which is more than enough time for spotting a crashed UFO at a considerable distance.
that is called marketing…
can be used in this light recheargable 18650s? or are they too long?
how many seconds can run xplhi version on high?
Protected cells won’t fit! It is advised to use high drain unprotected cells! :+1:
You have to do some modification in the tailcap to make protected cells become contact
A user in the German Flashlight Forum (TLF) tested this with copper rings in the tailcap
It works but not with the full power
this rechargeable lion are ONLY protected?? never seen them before…i know nobody whos using them,but i think its very progressive idea this lions…
No, the replies were informing that even a protected (longer than normal) cell wont fit, so therefore a USB rechargeable (also longer than normal) cell won’t fit either.
The USB rechargeable cells may not be protected, however I’m not aware of any High Drain USB rechargeable cells, and a High Drain cell is what allows the D4 to reach it’s full potential.
If reaching full output is not something you’re concerned with, you may be able to use a USB rechargeable cell by doing the copper ring mod described in the German forum.
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Also technically all 18650 cells are “rechargeable” to avoid possible confusion the cells you’re referring to would be better described as “USB rechargeable” cells. 
I was going to write this precisely 
“USB rechargeable” is more clear to understand what vresto meant