Updates?
Any word on this beast?
not forgotten - they tune it
So what kind of numbers are we looking at?
The numbers are still in line with my earlier estimates of 20k+ lumens and a bit less then GT70 throw numbers.
That is unless they take my advice (based on SVK89’s suggestion) and try the SBT-90 in the GT4. They are worried the cost would be too high.
Have they made a prototype using the SBT-90 to compare it with the 70.2?
Is there an estimate on what the cost would be?
No info yet on any part of an SBT-90 version.
I hope to find out about some projects wäinn2 weeks...
If you had to guess, based on your experience, what would that kind of price be? Just curious
I have no idea at this point, a lot more then the XHP70.2 version though since the LED’s themselves are an extra ~$30 each over the XHP70.2.
I honestly don’t think many people would buy the 70.2 version w/ ‘only’ 23k lumens for $350… It’s just too much money for nothing special in particular. There are multiple multi-70.2 emitter lights on the market, from the cheap Haikelite MT9r to Acebeam’s offerings, Imalent monsters, etc. Most of those are in more carriable formats than GT4.
The light is too big and heavy to carry for most people but the enthusiasts, but those that are willing to spend $350 on a light have other options on the market nowadays with better performance if they’re willing to shell out 50-100$ more (R90ts etc)
I would disagree. I think plenty of people would buy it. Yes there are other options, but I think these are enthusiasts that will buy both.
You are missing something. This light does do something very special. It’s thermals are so good it can essentially run on turbo until batteries are depleted. And some people such as myself don’t mind a hefty light such as this.
I really like the thought of a light with this much output, without a noisy fan.
You think it could sustain 23k lumens until the batteries are depleted? If it can do that it could be pretty niche but despite the dense fins I doubt the thermos can do that well. We’ll have to see the final product; but as is vs the price tag I don’t think it’ll generate enough income for Lumentop to consider it a successful company project.
From what I heard it was sustaining during initial testing without any movement which would further cool it. As far as Lumintop production goes, they already have the body that holds 8 18650’s from the original blf gt. I’m not sure if the head is the same diameter or not. But if so, it seems like it wouldn’t be too difficult to swap out the reflectors and what not. I could be completely wrong though.
I will say this. I’ve seen lots of people buy the Acebeam K75 for $350. For that same $350 I’d much rather have this. If they raised the price to $450 and put in 4 SBT-90s I’d buy that in a heartbeat.
So would I
The light itself can handle turbo until the batteries die (which at almost 400W of power, is not long). Although the real issue is the ~90C+ temps it can reach not being something you can touch bare handed.
will talk about the SBTs when i am there ;)
Yep.
The problem with passive cooling is that it relies on mass and a large temperature delta to dissipate the heat, or a superb thermal design.
Looking at the fins though, at 230W, I really doubt it could sustain a real continuous 230W.
The only way it could actually do this would be to use vertical finning and a fan connected to the battery pack.
This would hurt waterproofing, but when you need real constant power, that would be a good option.
The turbo mode is direct drive, so the light output (lumens) will decline as the battery discharges and it’s voltage drops. And the batteries won’t last long at full power. But even with those caveats it still has better passive cooling than anything competitive.
At least for me, the main benefit of the improved passive cooling isn’t that it can sustain max power for the few minutes it takes to discharge the batteries, but that it should be able to sustain something in the vicinity for 5K lumens for a few hours at a temperature that won’t burn my hand.
The Acebeam X70 and the big Imalents might be able to equal that, but (not coincidentally) they’re also huge lights. And (unlike the GT4) they use proprietary battery packs which may or may not be replaceable when they eventually fail.
Problem is this light is not gonna win any lumens war, thats not the point either but they must somehow manage it to be able to run at highest longer then a few minutes… then it doesnt matter battery will quickly eat up anyways but if u can do like 5-10min nonstop on highest then that would be very impressive…
so what LT should do it focus most on the thermal stuff this light can handle… the longer on highest before the head will get too hot too touch the better.