If I hadnt just bought the acebeam k75, I’d be all over this. It should have better heat management (though the weight might be a bit much for extended periods)
It depends on the wildlife, but I think most animals are quite sensitive to white light. Other colors? varies from species to species.
Coyotes and foxes can definitely see white light beams- they bolt at the first sight of a bright beam of light where the hunting pressure is heavy so most predator hunters use a red or green filter when it’s legal to use artificial lighting.
I dont have any measuring equipment, and I’m not necessarily a CRI snob, but do appreciate high cri and slightly whiter than incandescent tint when I can get it in a light form factor that fits my needs. That said, the sbt90.2 in my K75 has a quite nice tint for a coolish white, especially on the brighter modes. I’d guess it to be about 5400 to 5600k on turbo. I’m usually pretty sensitive to green and I was pleasantly suprised how creamy white the output was when I first turned it on.
I dont know if the bin is different than the sbt90.2 in my NI40 but it seems to be less prone to green on lower levels…maybe one is FET pwm driven and the other is CC. I’m sure that would make a difference. I know xpl2s look better (at least to me) when fet pwm driven.
I measured the SBT-90.2 in my K30-GT at ~5200K. I’m not sure of the tint bin in the GT90 but the one in my K30-GT is quite a nasty green (mostly in the corona) at lower outputs. The FET driver in the GT90 might provide a bit better tint.
I actually find myself primarily using the lowest output modes while I’m out on my night walks.
I see quite a bit of wildlife on my nightly trail walks, mostly small mammals and such. Some of them, like rabbits, mice and coyotes, run away at the first sign of light. Others, like raccoons, beavers and owls tend to freeze while they try to figure out what the heck the light is. If I suddenly turn off the light and they see me, then they run/fly away.
I actually had an owl swoop down at me and almost snatch my cap away after I shined a light on him for a couple minutes and then abruptly turned it off.
Here are measurements for the Acebeam K75 and Nightwatch NI40
The SBT90.2 is on the greenish side except at very high output levels where tint drops below BBL (negative DUV). Tint looks excellent once it gets below BBL.
One benefit of the FET driver in the GT90 is that once you get past the low modes and the main FET kicks in, the tint should improve to basically the same as the turbo tint for the rest of the ramp.
I see that it is another company ready to make a new light,quite a beast, with the same SBT-90.2 led,but even bigger reflector than the BLF-G. Astrolux.
Should be possible to drive it with a L4P driver with 2 or 3 extra FETs on the output and a same amount of sense resistors stacked on it.
Still, green tint or not, that’s not that important.
My objection, based on what i’ve seen in Matt VoB’s video, is the cold CCT.
The blueish beam makes it quite hard to see what you’re actually shining on.
I was not in the Group Buy but just received my light. It’s a throw beast and the tint runs cool. I have to say for my purposes the GT70 is still my favorite due to the amount of spill that I can see but I look forward to opening up the GT90 in longer areas to see how far I can push it.
