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Testing 3 10k+ lumen lights: Gates GT14 vs. Scubalamp V6K vs. Jaunt G18 Plus

gates gt14 scubalamp v6k jaunt g18 g18 plus

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#41 thetrickster

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Posted 18 March 2019 - 02:37 AM

I read about this too and wondered how they got 18,000lm from a nominally rated 12,000lm COB array - hence why I asked them directly what model and binning they used. I too was a bit weary about the claim too.

 
They are using the 5000k 72v variant with the CD binning - order code: CXB3590-0000- 000R0UCD50G.
 
As the CXB3590 has a max efficiency of 174 lumen per watt (https://www.cree.com...s/xlamp-cxb3590)  and with the G18+ battery putting out 103.6 Watts (14.8v * 7000mA) - that gets to you 18,026 Lumens.
 
From the PDF, it seems you can drive the COB arrays at higher voltages (up to 78v) and higher amps (up to 1800mA) which provides you will the higher Lumen rating than the nominal 12,000lm at 1200mA at 85'c, plus we are running these under cool water, so the constant output won't drop.
 
I'm sure they aren't outputting the full 18,000lm (as that is the optimal output) but as they are similar as the GT14 from Drefish tests, so we are definitely getting massive output in the > 15,000lm+ region.

Regards, Richard

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Camera Rigs: Nauticam Lumix GH5, 14-42mm II, WWL-1, Atomos Inferno, Jaunt DivePro G18 Plus Lighting. Underwater Insta360 One X. GoPro Hero 7 Black.

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#42 Interceptor121

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Posted 18 March 2019 - 02:54 AM

 

I read about this too and wondered how they got 18,000lm from a nominally rated 12,000lm COB array - hence why I asked them directly what model and binning they used. I too was a bit weary about the claim too.

 
They are using the 5000k 72v variant with the CD binning - order code: CXB3590-0000- 000R0UCD50G.
 
As the CXB3590 has a max efficiency of 174 lumen per watt (https://www.cree.com...s/xlamp-cxb3590)  and with the G18+ battery putting out 103.6 Watts (14.8v * 7000mA) - that gets to you 18,026 Lumens.
 
From the PDF, it seems you can drive the COB arrays at higher voltages (up to 78v) and higher amps (up to 1800mA) which provides you will the higher Lumen rating than the nominal 12,000lm at 1200mA at 85'c, plus we are running these under cool water, so the constant output won't drop.
 
I'm sure they aren't outputting the full 18,000lm (as that is the optimal output) but as they are similar as the GT14 from Drefish tests, so we are definitely getting massive output in the > 15,000lm+ region.

 

 

Sounds reasonable assumption. Still am a bit wondering about the battery but hey Chinese supplier for you


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#43 Lionfi2s

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Posted 18 March 2019 - 08:40 PM

Does anyone know the depth rating of the Jaunt lights?



#44 thetrickster

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Posted 18 March 2019 - 09:50 PM

Does anyone know the depth rating of the Jaunt lights?


100m :-)


Sent from my iPhone using Tapatalk

Does anyone know the depth rating of the Jaunt lights?


100m :-)


Sent from my iPhone using Tapatalk

Regards, Richard

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Camera Rigs: Nauticam Lumix GH5, 14-42mm II, WWL-1, Atomos Inferno, Jaunt DivePro G18 Plus Lighting. Underwater Insta360 One X. GoPro Hero 7 Black.

www.richardwait.com


#45 sideways

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Posted Yesterday, 05:40 AM

I just bought the Big Blue CB15000P.  I've seen it mentioned a couple times here that their Beam angle is 120 degrees.  According to their website the beam angle is 160 degrees.  Which seems a plus to me seeing I shoot a lot of WA.  We shall see in a couple weeks when I road test them in the Philippines.

 

 

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Edited by sideways, Yesterday, 08:24 AM.

Nikon D810, Aquatica housing, Sea&Sea strobes, Tokina 10-17mm, Nikon 105mm, 
Lumix GH5, Nauticam GH5 housing, 2x Sola 1200 lights.

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#46 dreifish

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Posted Today, 03:26 AM

I just bought the Big Blue CB15000P.  I've seen it mentioned a couple times here that their Beam angle is 120 degrees.  According to their website the beam angle is 160 degrees.  Which seems a plus to me seeing I shoot a lot of WA.  We shall see in a couple weeks when I road test them in the Philippines.

 

 

https://bigbluedivel...te-video-light/

 

 

That's 160 degrees in air, or 120 degrees in water (since they use a flat front, not a dome) I suspect. Nonetheless, unless you're filming with a fisheye lens a 120 degree beam angle is not actually necessary since a lot of that light will fall outside the angle of view of your lens. With a typical rectilinear wide angle lens and 2 torch setup, a 90-100* beam angle is plenty and will concentrate more of the light in the area you're actually filming. 



#47 sideways

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Posted Today, 05:19 AM

 

 

That's 160 degrees in air, or 120 degrees in water (since they use a flat front, not a dome) I suspect. Nonetheless, unless you're filming with a fisheye lens a 120 degree beam angle is not actually necessary since a lot of that light will fall outside the angle of view of your lens. With a typical rectilinear wide angle lens and 2 torch setup, a 90-100* beam angle is plenty and will concentrate more of the light in the area you're actually filming. 

Well that sure is a little deceiving.  I see nowhere on the product page that it says 160 degrees in air.  Yes, I shoot a fisheye lens.


Nikon D810, Aquatica housing, Sea&Sea strobes, Tokina 10-17mm, Nikon 105mm, 
Lumix GH5, Nauticam GH5 housing, 2x Sola 1200 lights.

My Flickr page.......https://www.flickr.c...s/29875870@N02/

Vimeo page.......https://vimeo.com/131607598






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