The distance I used to do the measurement was 10 meters also.
I will try to re-center the emitter from my end, and try perform the test again with my other throwers. [quote=JasonWW]
I think 20m is recommended with these big reflectors.
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Guys, i’m know, I just laugh at the price.
But in the end I’m counting on a good price, oscillating around the price of BLF GT.
We can’t count on the lower or the same as the Giggles.
My records show that on 12-29-17 my GT made 1.2375Mcd for 2,224.86M throw.
Stock version ? I bought my blf gt during the first group buy… so is my gt is like your ??
I changed the emitter in mine to a cooler white, but didn’t bump output.
I know there was a lot of hype about color tint and humidity spreading the beam, but it was all bunk. I got pictures of a stock warm white and a cool white both hitting a water tower at 1.9 miles in a light rain with humidity up near 100%. The cool white one put more visible light on the water tower. I even had my wife man the lights from the same position and I went to within a few hundred yards of the water tower and took pictures off-axis, still the cool white one showed brighter on the water tower. That was, of course, just the two lights I was testing. I can’t say all of them were similar or there was great disparity, I simply don’t know the answer there.
Edit: Let me make it clear, when I say it was bunk that’s what I found in my own testing, using high end photography equipment. What anyone else may or may not find is contingent on variables beyond my control.
At first people were measuring them at 5 meters and not getting accuracy. Then they switched to 10 meters and the numbers went up. Then they tried 15 meters and the numbers went up more. Now it seems like you need at least 20 meters to get an accurate reading.
Right Jason, the long distance throwers are focused for that near infinity point, to reach as far as possible, so testing them at short range is not legit… the beam isn’t focused yet. I’ve been testing lights such as these at 50M lately.
Hey db, how is your new knife? Are you still slicing burger with your knife???
That is not my experience, Nico and I found not much happening over 8 meter. Perhaps if the led is in percect focus there is a gain in reading past 10 meter, but I’m pretty sure it is not much.
Got definitely a little bit higher lux reading at 15 meter throwing distance but no gain at 20 meters.
I will like to see those pictures between the Nw and Cw.
From closer, off-axis… the flashlight was 1.9 miles away behind me and to the left.
My experience was similar to DB Custom but with fog. Not so long ago fog was so thick one could barely see the building about 100 yards away from my house. After all I have been reading about CW reflecting back the light in fog, I just turned on all my throwers one by one and they cut through the fog like laser beams and completely lit up the building. I was really surprised about it and happy that all my throwers except one are all CW.
Looking across the lake at about 6’ above the water level, from 1.3 miles away … looking INTO the GT…
We had 3 GT’s that night, 2 of us with me at the camera and a third across the lake with a lux meter. Even at 1.3 miles distant the lux meter showed .3 lux, or roughly full moon brightness level… you are seeing the meter lit by the GT from the other side of the lake, no lights anywhere around on a dark moonless night.
So this is the bar, can it be raised?
That is 2.08km. Not bad.
Any improvement on your lux reading after the adjustment?
So 2.08km is the new reference for beam tuning? 
Is it possible to show the Nw and Cw version against that tower?
interested