8000 Lumen Video Light

Using 8XML with Taskled Driver and 18 18650 (6S 3P) and the new TLS 3.5" OD (3.0" ID) canister. Canister pic shows 2.5"OD can vs the new 3.5"OD. LEDs will run 2 strings of 4 in series. Vf is about 12 volts at 6 amps! Will use a 6S LiIon pack by 3 parallel and PCB with balancing function.
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8000 lumen? is that all? Pfffffft LOL

Any issue with PWM and frame rate with the driver? As in flickering frames?

Packhorse said:

8000 lumen? is that all? Pfffffft LOL

Any issue with PWM and frame rate with the driver? As in flickering frames?

Click to expand...

I've not seen this with any TaskLED drivers, and I've used them extensively.

So far I have only hooked them up directly to the lab power supply. I will have to hook up the driver and see. George did make a run of high voltage drivers (30+ volts) which I was planning on using with 8 XML in series, but due to the cost of PCBs ($75+) with balancing function for 8S battery config, I decided to stick with a 6S pack. Only about $20 for that PCB. I will let you guys know. Those LEDs do get plenty HOT out of water and FAST.

you should use a thermistor switch in the head to avoid Poof &

nice work !

Looks like nice clean work so far!

Whats the cost on your 3in can?

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18 x 18650 battery pack 6S3P to power up the 8000 lumen light

Is this the battery you wil be using? Rectangular shape in your circular canisters. Is there much excess space/unwanted buoyancy?

I'm wondering if 3 rows of 6 in a circle would be more economical for bulk/buoyancy than a rectangle.

Well, 3 rows of 6 makes for a longer canister! I was trying to make it shorter. Buoyancy was not a big concern on my end. There is some space that one can use to put some weight in the canister.

'Like fitting a square peg in a round hole!'

Just did some 'what if's' on a couple of configurations; using the height of each battery as 65mm, plus a 5mm gap for insulating and soldering between layers, plus 5mm on each end.



Option 1 (rectangular 2 layers)...558,250 cubic mm
Option 2 (circular 2 layers)...511,425
Option 3 (circular 3 layers)...474,520

Note; This does not include whatever volume your plug and protection circuit will need.

Of course this is all moot unless you can dictate the ID/OD of the canister. Also moot if your canister is negatively buoyant regardless of battery configuration.

...I just hate having to add useless weight to a torch to keep it down.

Klem:
I agree with you... The main issue was that, as you noted, I did not have a say in canister diameter. I have those made out of clear PVC and got stuck with 3.5" ID. So ues, ended up with some unused volume. I do like option 2 and thought about it but looked to be a bit harder to construct so I decided to make it easier to my battery guy.

I will also have to see if the can is negative with all those cells. My belief is that it may be a bit on the + side.

In any case you can forget flying with that sucker ;-)

Codiak said:

In any case you can forget flying with that sucker ;-)

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lol, yeah, may be hard to convince TSA...

What is the watt-hr capacity of the pack?

6000mah at 22.2 volt. I was hoping for about 7000-7500 but this will work

OK, so I finally got the head assembled, finishing up tomorrow. MY impression is that there is definitely not enough throw on it. It is a bright son of a gun but all flood and really wide. I think with 2 heads holding the DX 3XML module with reflector it will work very well, but by itself just doesn't seem to me (above water) to be enough... So for now I will say a combination of reflectored and reflectorless may be the trick.

This monster looks intense! Nice work!

350xfire said:

OK, so I finally got the head assembled, finishing up tomorrow. MY impression is that there is definitely not enough throw on it. It is a bright son of a gun but all flood and really wide. I think with 2 heads holding the DX 3XML module with reflector it will work very well, but by itself just doesn't seem to me (above water) to be enough... So for now I will say a combination of reflectored and reflectorless may be the trick.

Click to expand...

Won't the reflector create a hot spot?

The DX 3XML reflector creates a really large floody spot. I think that willk provide the throw. The ones without reflectors will provide the flood.