Acebeam K30GT measurements Driver

Flashlight Modding and DIY Parts
1

Hello,

I would like some information about the driver of the Acebeam K30GT contributions.
@Lexel dismantled the lamp and took a few measurements:

The buck driver has the following power:
Ultra-low 0.15 A.
Low 0.37 A.
Mid1 0.947 A.
Mid2 2.44 A.
High 5.77 A.
Turbo 26 A.

90W * 1.06 / (3.4 * 3) a protected battery should also be able to provide at least 10A to operate it.

Lumen measurement in my “Ulbrichtkugel”:
Acebeam K30GT SBT90.2 VTC 6
Cold: 5988 Lumen
After 30 Sec: 5293 Lumen

Here is the buckchip:

He also bridged all the springs and rebuilt the battery so that all batteries fit, even those without a button top.

I will do lumen measurements later.

Here are the pictures and the diagram of the SBT90 gen2.

The 5700K variant is probably installed in the K30GT.

You can buy the Led here:

2

Cool take your measurements…… then…

. If you want more Lumens and Throw take the Lens Off…

3

$182.00 US seems a bit high.

4

A little cheaper ($159 free shipping) and on the US side

. Andrew Amanda outdoors E-Bay

. Acebeam K30-GT SBT-90-GEN2 LED Flashlight - Max 5500 Lumen, 1024 Meter | eBay

. Battery Junction

. Acebeam K30-GT Searchlight | Battery Junction

5

@KawiBoy1428

can you prove that?
@Lexel thinks it is 0.3%.
Not measurable and not visible.

6

It’s the highest performing LED I have out of the 5 I tested with the lens on…it’s the only one I took the lens off of…

The other 4 barely made 4800 to 5200lm at T/O then I got 358Kcd. But now out of the same exact light, battery and driver set-up it is now doing 408Kcd just swapped the board and LED out… proof enough for me…this is an actual reading the meter isn’t locked on to the highest burst…

T/A maukaka calibrated tube YMMV…

. Luminus SBT-90 gen2 5700K tested (SBT-90-WDS-F72-SA600 SA-H4, from Neal)

7

The window is AR coated with likely 99% transmission
and the reflections are mostly shining back on the die, so they get recycled, so removing this glass would be a minimal change like 0.3%, not worth the risk

on your last picture there is already a speck of dust on the emitter that may burn in destroying the LED

Trying to measure this is not possible as its smaller than the usual measurement error, even with professional gear

8

Did you test this? The window is double AR coated (both sides are AR coated), and Dale got more out put removing the window on 2 of his builds…. I think I got a better performing SBT-90.2 and the others were for shit? I got one more left from Neal… and 2 more coming on 45mm boards…I caught the spec of crap on the LED, it is working fine, was playing with it all night long… I also had to open up the centering ring diameter to fit around the LED pad, I think before it was sitting on around the metal rim…kind of weird that everybody is testing 4700-5000lm and lower and this one out of 5 performs better…… I’m not selling this one…

9

Arnold in this topic tested his with AR window cold start almost 6k Lumens and his Lumens are pretty precise on all lights

I have worked with laser equipment a long time and the difference between an 99.98% mirror and 99% mirror
it is only with precise gear measurable if done in a measurement without changing the test setup in any way
and if you clean the 99.98% it will get worse than fresh out of the box

I bet those windows are made from precisely parallel glass, maybe not laser grade but enough not to distort the beam in a measurable amount

Just sticking the light a slightly different in the lumen tube can lead to different results

10

Yes, true…but I’m sticking by what I’m seeing in my own lumen tube…trusting Dales readings in gain, until somebody with the good measuring devices can actually test it too