Lumintop GT4

The switch needs to be lit. I don’t like twisting big lights in the dark to find it. Really any lights, but the bigger the more awkward that can get.

Yes, the switch will be lit like the GT and GT70.

I really hope a ww variant is made, even if a limited run. I absolutely love my GT70 with the 3000k 70.2 I understand people like the light saber effect of throwers with the cw emitters, which I agree is pretty cool. But with floody lights ww is amazing.

What is ww please?

Warm white, more like incandescent color.

Yes, the 3000k GT70’s I built did look pretty good and worked well as well.

No idea at this point what tints they will offer though.

Modding is always an option as well, this light will be easily moddable like my past lights.

You did those 3000k variants for who, NASA? I mean I don’t see them custom ordering Warm White because they are tint snobs. It really just works better in atmospheric conditions.

Yes, I did one for NASA and a few others for some BLF members that wanted it.

Nasa wanted even warmer then 3000k because like you said, science proves that warmer works better at throw. They had me de-dome the emitter to gain throw and get it even warmer. Ended up around ~2600k-2700k IIRC.

Thank you very much.

Interesting... We had a couple NASA engineers here at work and they heard about my "hobby" and were very interested so I gave them a run down on current LED tech, modding, drivers, firmware, etc.

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…