The new SF47 is a dual 21700 light with quad SST40 emitters which is rated 9000lm on turbo, in a conventional flashlight format with a side-mounted e-switch! No more fumbling around with a tailswitch on a long-handled light, as everything is done from the sideswitch itself.
The box is a nice thick foam-lined brown cardboard box which protects the contents nicely. There’s the bubble-wrapped light, charger in its own white box, the manual, and baggie with lanyard and extra O-rings. It’s not quite a presentation box, but is certainly secure.
The light itself is quite substantial. It’s got a nice weighty feel in the hand, good knurling where it counts, lots of thermal mass for bright bursts of light without having to step down too quickly (and with active thermal regulation).
As usual, the light has the same nigh-flawless semigloss black anodisation without a single nick or chip or void, and I look quite closely under a lighted magnifier. 
Also, the front glass is clean, no fingerprints anywhere on it, and a nice mirror-finish reflector with no dust apparent anywhere. Starting off right!
My only druther would be if the battery tube were reversible. I’d like the rectangular knurling to be on the head-end of the tube vs the tail-end, if only to have the full knurling under my hand when holding the light. I prefer “choking up” on the light when holding it, to have my thumb on the side-switch, but the smoother part (less aggressive knurling) ends up under my palm. Having the rectangular knurling there would give a bit more solid grip. Again, it’s a minor nitpick, but… 
The beam is quite nice for a quad-emitter light. There’s a slight cloverleaf effect in the periphery of the beam, apparent when going white-wall hunting, but in practice isn’t really noticeable unless you twirl the light when otherwise holding it steady. At moderate distances, the hotspot blurs nicely for a nice smooth beam. There’s a bit of angular tint-shift, but it’s not too fried-eggy. Overall color temp is about 5500K if I had to guess, nicely neutral, despite the label saying 6500K. Pleasant surprise!
Brightness is out of this world, though. Basic modes are low/medium/high, with hidden moonlight and hidden turbo. Normally, just click-on and click-off, and it remembers the last-used mode. Shift through modes by pressing’n’holding the button when on. Moonlight can only be accessed from off by holding the switch vs simply clicking it. Turbo can be gotten to from off or on by double-clicking. Bright doesn’t begin to cover it. My Q8/DC7 belt out about 4000-5000lm, and the SF47 claims 9000lm, which seems about right based on eyeballing my ceiling-bounce tests.
According to the manual, low/medium/high are 200lm/1000lm/3000lm, which seems about right. High is just a smidge dimmer than my Q8 (about 4000lm), so yeah, 3000lm on high seems about right. Turbo, 9000lm, is hella bright, lighting up the entire room via ceiling-bounce to the point it’s as bright as daytime on a sunny day. The only thing that comes close is my MT-09R. Moonlight seems lots more brighter than 1lm, and if I had to guess, I’d say 10lm or more. Even in a lamp-lit room, moonlight easily throws a visible disc of light on the ceiling. No complaints, because why would you carry a light this (relatively) big and powerful, only to want to throw sublumen levels of light. This 10lm is about perfect for around the house, eg, just enough light to see in the dark and not trip over anything.
The SF47 has both ramping and stepped modes. Hold from off to get into moonlight but keep holding a few more seconds until you get a visual blink, letting you know it toggled from one to the other. Ramping is nice, but seems a bit too linear vs logarithmic, ie, it’ll linger on the brighter end of the ramp without much changing visually, but fly through on the dimmer end a bit too quickly. So for me, stepped mode is perfect, and I keep it set to this, even though I really like ramping. 3 basic modes are great and let you skip through all of them very fast for most uses, and having both ultralow (“moonlight”) and turbo available practically instantly makes the UI very simple and flexible at once.
As mentioned, 2clicking gets you turbo, and 3clicking gets you the blinkies, always starting with 2-frequency strobe, but holding the button will get you to SOS, and then beacon. I made no secret that I hate hate hate both strobe and SOS modes, and would be thrilled if it would memorise the last-blinky used, so I could set it to beacon and leave it. At least blinkies are sort of out of the way.
4clicking locks out the light and lets you know with a double-blink that it’s locked. Any button-pressing will get you another double-blink as a reminder until you 4click again to unlock. That can come in really handy if you carry the light in a glovebox, toolbox, etc., and don’t want it to accidentally turn on.
About the sideswitch, there’s the usual LED indicator that lets you know at a glance the general battery status. Green means enough juice, red means running low, blinking red means almost dead. I’d never let it get into the red zone at all, and would make sure both cells are adequately charged.
Speaking of which, the two 21700 cells are quite good. In 2 tests, both cells clocked in at around 4600mAH and 4700mAH consistently, well within tolerance, on my Opus ’3100. No problem lighting up at the full 9000lm. :laughing:
A dual-cell charger comes with, as well as the USB cable to plug it into, so you can charge both cells at the same time. Nice! The usual red/green LED arrangement lets you know when it’s charging and finished. And given how many chargers don’t even fit long cells like protected 18650s or 21700s, having this even for other cells is quite handy!
Back to the levels, L/M/H are about perfect for a general-purpose light. Moonlight adds more functionality, and turbo is… wow. I keep the light set on low for most things, yet still have the two shortcuts for instant access to both other modes. And with general hand-feel, good balance (the longer tail balances out the heavier head), and a pretty useful and easy user-interface, the SF47 is a great around-the-house light. I was a bit skeptical at the “need” for a full-size light like this, but everything just seemed to “click”, and the SF47 seems to just tick all the boxes.
Anything to add to a “wish list”? I’d really like the option for an always-lit sideswitch just to be able to tell where the light/switch is located in the dark. Dim light or a “beacon” would be nice, just no hideous “breathing” switch (creepy). Other than that, I can’t really think of any improvements. Hey, I did say it seemed to tick all the boxes, no? 
Anyway, I’m happy. :laughing: