No idea, looks great though! Just saw it on FB this evening. Hopefully should out-do the old Shockers - think the best I got was over 500 kcd. Some slice&dice action on those biggies should do.
4 xhp70.2s in huge reflectors vs 9 xhp35 HIs in smaller reflector wells would be an interesting comparison. seems like the gt4 will make for slightly more lumen but slightly less throw.
It will be more reliable than the R90C specially at the driver, step down is user-controlled, probably brighter, much better heatsinking, and most likely without the fogging issues of immalent lights.
Sadly max output will drop accordingly to the battery level, being a direct drive setup.
This light was first planned WAY back when the GT was still in the planning stages. Needless to say things have progressed since then and it is not quite as revolutionary now as it would of been 2 years ago.
At this point, yeah there are other lights that would be direct competition for sure. How they would compare is something I can’t know without some testing though.
Lumintop finally said they want to proceed with this project and I was sure not going to say no lol.
Based on VOB’s lumen readings from the R90C though, I do expect higher lumen output from the GT4. My goal is ~20k real lumens or more.
I wonder how much the head weighs? it must be alot more then normal gts as it looks quite beefy in the pics. So a runtime on highest should be like 5min atleast or so based on how it looks ?
If it has good runtimes on highest then it can compete with olights and acebeams monster lights then if the price isnt too high also.
It is not extremely chunky inside the head, a lot of volume is converted into finning, but fins have mass also of course, so yes, the head has a bit more volume and will be heavier than the GT. I’m really curious about what the sustainable light level will be actually, large flashlights have an unfavorable volume/surface-area ratio so scaling the power up from a smaller light requires disproportionate measures to create extra surface area (=fins). This is attempted in the GT4 but how the final sustainable output proves to be is a surprise. I hope for over 10K lumen with the head kept under 60 degC. (that will drain the batteries in say 45 minutes, so sustainable is relative )
Classic lumens/thrower with more emphasis on the lumens (XHP70.2's). The Shocker had C8 size reflectors, looks roughly these are about the same size - Shocker had a smaller head diameter with 3 cups. Of course XHP70.2's can't compete even with a XM-L2 in throw, but maybe are closer when driven harder, and in the stock configuration, should beat a Shocker in throw for sure mainly because of the FET based driver and high amps.
I think XHP35 in GT is at or just under 150 cd/mm². Well cooled white flat is over 300 at peak, a little less in a regular fat host like GT. Boost HX should be even more intense. So… 75% higher LED intensity, 260 cd/mm²?
You would have to lose 43% elsewhere to end up with equal throw. What are the losses elsewhere?
Area loss. Not that high with a siamesed 7-up, especially that you can make the reflector cups very deep.
You may also lose a bit of throw by worse centering.