The settings allow a range of modes
So indeed using a mode suitable should not be a problem 
Right, I get that… but I am wondering if based on the LEDs/Driver combination there would be a sweet spot of greatest output for lowest power expenditure. And if so, then what that output might be.
Thanks again
I’d have 3500-4500lm in turbo for 1 minute or less. Then step down to max mode with 2000-2500lm
We can’t have more with SRK soupcan body.
Roche m170 is bigger and has more weight for his ~2600lm max mode
Caleb, Tom will probably shed some light on this
What I do know is that we aim at a ramping mode to choose besides the normal modes. And in my typical use I mainly set a light to a brightness I need (outside max, inside med for example) so the ramping would allow for minimum needed brightness in any situation thus prolonging use.
To get a feeling and gaining knowledge for this group buy, I just finished a 9xXP-L Hi SRK-clone mod that draws 24A (see the what did you mod today thread). It has warm white emitters so the (continuous) output is ‘only’ 4500 lumen (5600lm at start-up), but the power consumption is 90W. It is too hot to hold in (just measured) exactly two minutes (room temperature without air flow). Too hot to hold for a light with a good thermal path in my experience is the correct moment for a stepdown (a safe distance from damage). At the same current, with cool white or neutral XP-L emitters, this light would put out well over 6000 lumen, with added DTP-boards 7000. It feels that the body can handle that, but for a stock light to handle these amps and heat it requires a good design with no mistakes. We are aiming for that of course. And we’re making a 4 emitter light, not 9, so if we really want 6000 lumen OTF that requires very hard driven XP-L leds.
A stable continuous output (room temperature, no airflow) for a host like this appears 6A/2000 lumen to me, with airflow at least double that.
If I were to run a customer BG light, I would want the light to be running above 10000 lumens to make it extremely unique
This group buy is for a 4x parallel battery, 4 led light. You can not get 2500 lumen OTF out of any 3V type led.
Sounds great! Can’t wait to see what specs/price it will have.
I’ve seen the 10K mark mentioned before so surely there will be interest!
I have a UltraFire 7XML SRK clone that puts out more then 3000 lumen stock - guestimate from ceiling bounce with a lux meter. It is 5-8% dimmer then the massive TR-S700 that has been reviewed here at 3500 lumen.
I would love this BLF SRK to go up to more then 5k lumen on turbo and 3k+ on high. More then that would require 6V/12V and a more complicated battery setup which will raise the cost. That would be for a future 12V edition you can start your car with… 
Well, 4x XP-L V6 @3A each will make ~5000 lumens at start. I think I’d be happy enough with that output. It would be ~41.5 watts to the four emitters. Can the host take that? I don’t know. I’ve never owned a SRK. I seriously don’t want it pushed so hard that reliability becomes an issue. And I don’t want any ~6V or ~12V emitters in this light! Maybe we can work out ~6V emitters in V2.
1 xpl nw for me plz
Yes I think maybe you guys are right, the 10k+ lumens obviously needs the series cell setup and so is out of the scope of this.
Maybe a different thread for a totally separate light with series cells and XHP, obviously we would be looking at a $150+ light. Maybe not so much interest on BLF 
I’m still looking forward to this light, shaping up well for the original design plan :sunglasses:
I might re-sub to the thread in 6 months or so and let the wizards do their thing, no way we will have this for Christmas is my guess
No point getting excited at the ideas just yet, just torturing myself!!!
heheh thanks for the trust
and indeed it will take some time
OK, able to be continuously comfortably held in Brisbane summer night time temperatures (25C).
OP updated with
NEW POLL, community feeler:
Please vote and thanks in advance!
Im 100% with you brother.
go hard or go home 
The answer is simple: direct drive it to as many lumens as we can economically do. Implement thermal control instead of turbo timeout so it remains holdable at any ambient temperature.
I don’t care if it won’t do max output for more than 30-60 seconds before going back to lower output. There are many cases where that’s all I need it for.
+1
Yes fixedit +1
Except that maybe a user configurable turbo timer could prove more stable then thermal control. (maybe could ;))