Lumintop GT4

Interesting indeed. For the record the NASA I am referring to is not NASA directly but a NASA contractor working for a NASA funded think tank as I understand it. They were working on some form of rescue drone at the time IIRC.

We work with a project manager who actually works for Oceaneering Space Systems, so at least he's in the NASA offices and we can talk with him now. The other regular NASA engineers are all basically locked out now, barred from entering the building, as we were told. Guess that will end on Monday, least ending for a while.

How about 4xCFT90 LEDs? Expensive but how much output and throw we talkin?!?

Does it come with oven mitts?
One 70.2 at 7kl gets VERY hot, can’t wait to burn my hand around 4x70.2.
Put a fan in it you wankers!

The strength of the GT4 is that it is specifically designed for passive cooling with still high sustainable output. Adding a fan would make the design less simple (= bad for a tool), comes with a big waterproofing challenge, and adds a moving part that is likely to fail over time. And it is noisy.

300 watts!
That thing can dissipate 300 watts?
I don’t think so without the inevitable thermal throttling after about 2 mins<.
besides who would go swimming with a light like that. one would need a flotation device.
That light has been done before by Acebeam and Imalent, except they added a fans.

Yeah take my money but I want to be able to use the thing for more than 2 minutes at 20kl, or tell the costumers that max sustained output is really 12kl or whatever how much thousands less it can run passive until LVC.

BTW, Lumintop I believe makes some the best lights, I think they could pull off a cooler running solution to the GT4

what makes the gt4 different then acebeams x45 that does 18k lumens and has also 4 x xhp70.2 emitters? and on highest it can run like 3 min or so before stepdown ? but the gt4 has more massive heatsinks so it should run longer and handle the heat better. I dont think adding a fan is a good idea, its clumsy and doesnt really help much its better having a giant heatsink body instead.

lets just wait for lumintops runtimes after CNY and see how it will perform.

See that’s what I’m sayin… 4xCFT90 LEDs for the win!

Do you know how much the light would actually cost 4x CFT90s and a suitable buck driver?

It would easily be in the thousands.

Sure if you can feed them about 120-160A and dissipate about 600-800W of heat…

Thinking again, what a great host to run a single CFT-90 at max, at least for a while…

Oh… that much amps? Jeez.

Well a light as big as the GT I would think could handle it, even if we are talking burst turbo 1 minute.

4S2P Samsung 20S would drive the emitters hard.
I’m not a big fan of CFT-90 but this would be a real hottie.

Vinh of Skylumen already sells it, 1xCFT-90 priced around $500-700, been out for a while now. He has some sick beam shots to go with it too.

I was thinking he could manage a 4xCFT-90 with the quad reflectors and epic heatsink upgrade on this version,

I believe he did TN40S with 4xCFT-90. So he should be able to do a GT4.

The GT4 will be like the GT and GT70, setup for easy mods down the road. Although CFT-90 will not be a factory option for sure, just far too complicated and costly to be practical.

I am positive that there will be custom mods with this though.

what the difference in price between a CFT-90 and a average cost LED like the 70.2?

These are $100 per LED, roughly.

why so expensive, new type of led or ?

$15 per 70.2 vs $100 per cft-90. Also maybe $25.00 for 70.2 driver vs unknown amount, but I would estimate at least $100.00 for cft driver. Also, don’t forget that the 70.2 will have more output but lower luminance than the cft90 at max current. So most likely at least 400.00 more than asking price for base gt4 for a cft90 light would be what I would expect. If custom sourced it will be more.

The highest bin that Mouser has in stock goes for around $116 the last I checked… and bought! Because I had to have just one…