Are you thinking of doubling the lumens does not double the lux?
If I take 2 lights and a lux meter, their individual lux readings all add up for me.
I think you are describing a personās perception of light as opposed to measuring it with a high precision device. Our eyes can not see small differences in brightness like your describing.
As an example of just how bad our eyes are at detecting brightness levels, I was watching the output of my ODF30 light on Turbo. It stayed steady at about 3000 lumen then started to ramp down to 1900 lumen over a 35 second period. I didnāt even notice. 
I wasnāt specifically looking for it, so when it happened I didnāt notice it. If it had abruptly stepped down it would be noticable.
I typically can not tell a 500 lumen light from a 600 lumen light when held side by side. I can stare at it on a wall and guess which is the brighter, but Iām not positive.
This is why we need to measure things and not use our eyes.
Sorry, I canāt help on the grow light stuff. I donāt know anything on that subject.
I guess Iām just used to taking a lux reading at the center of the hot spot for Kcd reading, which in turn determines throw. Using a diffused light from the ceiling bounce just doesnāt compute as Iāve never done that, always had a light box since I got a meter.
From 5 meters, shine the light on the meterās sensor and multiply the reading x25, then take that reading and multiply times 4 and use the square root of that answer for throw.
Ceiling bounce lux is an obtuse number, it doesnāt line up with anything from the manufacturerās or the normal mind set of what a light is doing, ie: itās not lumens, itās not Kcd, itās not throw. Itās making do with part of the equipment or simply not using the meter in a term that weāve used for some years now to establish lux as the intensity of the hot spotā¦ 135Kcd as this light has been measured.
Iām coming off pretty much a solid workweek of bad days and meds, so itās probably just me not making sense. Sorry.
Got it today, itās lovely, finish is also excellent.
Puts out a fair amount of light too for a light this size 
Would have never dreamed of that a few years ago.
I hope you ordered the 18350 tube to go along with it, man I LOVE it with the short tube! :heart_eyes:
wont the battery life be crap then? i think its ideal as it is, no need for smaller tube as its so small already compared to its big brother 
and u can put it a 3000mah battery.
Along with the half cell comes reduced run time, of course. Sometimes needs varyā¦
Yes they doā¦.
Got my GTmini today and I love it!
And with short tube itās so cute
Man the beam on this thing is just insane, i tryied on a building 400m+ away ,not a problem, light hits it for sure, haha crazy thrower at this size
I got mine today in the USA so maybe the rest of the USA orders will show up soon.
Here are my measurements from a stock CW GT Mini using a Samsung 30Q.
Tail amps @30s using UT210E:
Top of ramp - 2.85A
Turbo - 5.5A
Parasitic drain normal - 0.18mA
Drain with switch led off- 0.02mA
Candela @30s and 10 meters using LX1330B:
GT Mini - 148kcd = 769m
Convoy C8 xm-l2 CW - 39kcd = 395m
Stock GT - 1.05mcd = 2,049m
Lumens using Texas_Ace Lumen Tube calibrated from Maukkaās S2 plus CW:
GT Mini:
Top of ramp:
turn on 720 lm
@30s 705 lm
Turbo:
turn on 1240 lm,
@30s 1200 lm
Convoy C8 xm-l2 CW
turn on 850 lm,
@30s 785 lm
I would take my lumen measurements with a grain of salt. My tube had to be really dialed down to read accurately to Maukkaās calibration light. Iām still working on this. Even so, 1200 lumen is pretty much on spec. Iām sure other lumen tubes and devices will read higher, maybe much higher. No doubt that the 148kcd @30s is quite impressive. Higher than spec. :+1:
This is a very impressive light. It truly blows away my Convoy C8.
Someone asked me if the Mini really does blow away the C8. I went and took some pictures, but the question got deleted.
Anyway, here is a comparison of the hot spots at a reduced level, but the same relative brightness as if both were on turbo. You can clearly see the Mini has a much smaller, tighter and intense hot spot.
In this picture I had both lights on turbo and the camera sensitivity turned way down. The C8 looks like a corona that is missing the hot spot.
So yeah, the mini really does blow it away.
Yes, protected seem to fit fine. I have a 69mm Keeppower 8A protected Sanyo GA 3500 and a 69.5mm Evva 7A protected Panny B 3400.
The tail springs can collapse down really far so that shouldnāt be an issue.
The thing you should be aware of is the amp draw on your protected cells. If their protection circuitry is only 3 amp then you may not be able to run the GT mini on Turbo.
I measured my Evva at 4.1v and got 2.2A top of ramp and 4A on turbo.
My KeepPower at 4.1v got 2.2A top of ramp and 4.3A on turbo.
That is some good info you posted Jasonā¦ thank you. 
Did the tracking info for yours ever update before it was delivered?
Nice to see you oversea guys got the mini tooā¦ :sunglasses:
Great pics & view mortuusā¦
I got mine last night, definitely outperforms my convoy c8, even with a dedomed xml. Using mode select (ie not ramping) is 100% equivalent to turbo?
no u have to double click, ramping does not go to turbo.
Yeah but in the mode select option (I donāt like ramping) it doesnāt have the double click to turbo
oh my bad i thought u were talking about ramping modeā¦ no idea then.
It depends on which mode set number you are using.
Modes 1-6 use the top of the ramp as 100%.
Modes 7-12 use full turbo as 100%.
-You can download the manual here
This is the manual that still says it uses a buck driver, just ignore that part.
thanks for clarifying that JasonWW!
still waiting for mine. emailed, no response yet, to get an update on when will it ship out.