I haven’t measured the U2 lux number (if I did I must have them written down somewhere. Just need to find them). I can’t remember the exact lux recorded for the U2 @ 1m but IIRC it worked out to around 426 yds? Don’t quote me on that though.
May I know where you see the under driven issues mentioned? Is it one of the member here got one that is not bright enough, I forgot who he is already.
Mine is definitely driven very hard. It got so hot to touch in 10 minutes. Of course this is very subjective to judge by touching heatsink.
As my Terminator is between Fenix TK70 and Trustfire X100(3*26650), so she should be within 2000 to 3000 lumens. Again, this is very subjective as different person or different led tint will have different perception.
How to do a simple relative lumens comparison without sphere?
Got my 2nd Terminator. It is fun to carry two of them though both hands are occupied. I like her handle with button so much.
I pointed both of them side by side close to each other on the wall, intensity is indeed perceivably double, and size of hotspot also double. Damn! Where is my lux meter. It means my original idea of 5 Terminator might beat Foursevens XM18, wonder why they put 28*18650 in it, maybe it is for fan as things got very hot. Now my thirst for Olight X6 is gone. And the question is do I want to get another 3 Terminator, can’t find a standard low cost mounting for 5 yet. And I can get RC40 for that money, I must as I have already skipped TK75.
I am at the moment application level, can’t find time and energy to do DIY. I am sure I will face a lot of failure if I can ever make a 15000 lumens light myself. Thanks for the link though, you are definitely expert designer of lighting instruments.