20000 lumens monster canister light—WURKKOS Most Powerful Dive Light Yet

[Wurkkos Diving Light]

Sorry but you are developing underwater products and should have engineers for it. They should know how to either calculate or measure it. If not, tbh, I have a couple of concerns about quality.

You are right. The unprofessional means unstable quality. That's the exactly I'm come here now.
We currently test the waterproof performance by using the professional pressure instruments in Wurkkos laboratory. Through tested 98KPa, 196KPa etc atmospheric pressure by simulating water pressure. I'm curious about how to test its weight underwater. Really need advice

 

[Wurkkos Diving Light]

IMO : Have you ever wondered why no reputable manufacturer makes such CRAP ... a very serious question? Light like that is technically user useless ..... without even looking on quality of production. With that light you can not dive without sunglasses , you can not film or making photos because of overexposed and wild shadows like on moon , animals hide ......LOL .... then why for ?

Yep, from the film or making photos, it is useless. For only provide illuminate a large area of black water. Or fish-hunter continue 24 hours.

 

[Wurkkos Diving Light]

How about using a luggage scale to weigh the light above water, then lowering it so that the torch is below water, not the scale, and checking the weight of the torch when it is submerged (again, don't dunk the scale underwater)?

It's a worth method for trying. How much depth is appropriate? As my feeling earlier. The deeper water, the buoyancy greater.

 

[Wurkkos Diving Light]

I am guessing Y is "lumens" and X is minutes?

Yep, the Y is "lumens" and X is timer (close seconds)

 

[Wurkkos Diving Light]

from other perspective ...pure technicaly ......

- driving 6x 18W leds and then also cooling it ..... hmm I would not design that housing because cooling from thermal source to cooling site is to long - picture from top is possible IMO with cold ( from freezer ) maybe for minute or two , more for sure will melt PCBA , and battery but for sure it has thermal protection inside which act on PWM .... but then search& rescue for few minutes????

View attachment 896650

- such battery is very high risk at water intrusion ( from explosion in closed but not sealed tank and will act as bomb ) because of Lipo battery choose . I would take LiFePo4 or something much more safety , but it will take more space

- for serious search & rescue it should be chosen canister type with

- LED's are probably driven because of battery spec in series , we have a deal with high currents - up to 6 amps , which need PCB with short and wide tracks close to cooling plate and fat MOSFETs

-weight 1 kg in water on hand .... no thanks

-IP68 ... no thanks

the IP68 rating is only described and not fully specified by means of concrete values in the IEC 60529:

1. The first digit, the number “6”, means that the instrument has total dust ingress protection.
2. The second digit, the number “8”, means that the instrument is suitable for permanent submersion in water.

in our case is problem dynamic submersion in water mostly from deep quick to surface - there most of lights made failure ; ( not submerging them to deep )

and bla , bla , bla ......

The super detailed opinion. I can see many people's concerns to a new brand. It should time and development to offset these negative effects. Just like the Industrial Revolution.

 

[Wurkkos Diving Light]

Actually, unless the beam is truly focused with no spill over, in very low vis environments with a lot of turbidity, it would be pretty much useless. Like high beams in dense fog. Everything would be reflected back into the searcher's face. 17 degrees is nowhere near narrow enough. 6-8 would be more useful. IF you could also control the spill.
I've done some black water dives where an 18-watt HID was just a dim blob on the end of my hand. Bringing it closer made it a little brighter, but the closer it got, the worse vis got because all the light was reflected by the crap in the water. My HID was like a laser beam when focused to its narrowest setting compared to my other lights.
And my night vision was shot. It was safer to Braille dive using my fingers to "see" what I was looking for.

Got it! "17 degrees is nowhere near narrow enough. 6-8 would be more useful. IF you could also control the spill." I marked it on my notebook

 

[Badger7]

I'm curious about how to test its weight underwater. Really need advice

I use spring scales to measure the weight (negative bouyancy) of a component submerged in water.

 

[BoltSnap]

It's a worth method for trying. How much depth is appropriate? As my feeling earlier. The deeper water, the buoyancy greater.

No, not much, just sitting at the top of the pool, holding the scale above the surface with the light dangling from the scale in the water.

 

[tursiops]

The deeper water, the buoyancy greater.

No. Why do you think this?

 

[ChrisMBC]

The response to comment questions.

2. It's the weight above, we don't know how to test the underwater. Could you give recommendations?

If you don't have easy access to a spring luggage scale, a good alternative is simply to measure the volume of the light using a measuring jug. Put 1000 mL or 2000 mL of water in a large measuring jug. Then, put the light into the jug (ensuring there is enough water to entirely cover the light), and measure the indicated volume, and use that to calculate the volume of the light (for example, if you started with 2000mL of water, and now your jug reads 2560mL, the volume of your light is 560mL).

Once you know the weight of your light out of the water, and the volume of the light, it is easy to work out the effective weight in water (both freshwater and salt water). The light will experience a buoyant force equal to the mass of the fluid displaced - so, if your light weighs 700g on the surface, and displaces 540ml of water, the effective weight in freshwater will be (700-540 = 160g).

3. We currently can't make a Goodman handle at low cost. The body will come with a 1/4 Inch screw hole connect handle always.

Feel free to send me a PM. I build custom Goodman handles for dive lights and I would be happy to license you a design or have a batch manufacturered.