TK's Emisar D4 review

Emisar D4 in black and grey with Talon Grip tape installed on the 18650 battery tube:

This tape is great. Available on Amazon. Easy to install. Thin but durable. Sticks great. Turns a slippery light into a super-grippy one.

Have you see the numbers in this review, page 1 in this thread?

Yes those were the number I was referring to. I mean. It's the delta from what maukka has reported and what hank has stated.

ANSI lumens vs flashlight lumens, mostly.

Most flashlight companies use a “lumen” value which is somewhat different than the ANSI standard lumen. I’m not sure why, but it happened and it kinda got stuck that way. Maukka uses something pretty close to the official standard, and I’ve been using something pretty close to the flashlight industry’s unit.

This difference also shows up in Zebralight lumens vs EagleTac lumens. EagleTac’s numbers are lower for the same actual brightness. It seems like most companies and most of BLF and CPF are using Zebralight’s scale though, or something very close to it.

The general rule is that published lumen numbers are only comparable to other numbers published by the same person or same company. Measurements by different people use different units, because no two are calibrated quite the same. This does improve somewhat when multiple people use meters created and calibrated by a single person, which has happened occasionally, but for the most part, different people’s numbers aren’t comparable.

Thanks! You’re even more meticulous than I thought. :slight_smile:

(also, I updated my earlier post speculating that you might check a few samples instead of every last piece)

I’m not surprised. This thing uses twice as much power as my soldering iron. Starting fires is not a difficult task for it.

Basically the entire top half of the ramp is “turbo”, as in “burst mode only”. There are reasons why it steps down quickly and doesn’t have a way to completely disable thermal regulation. :smiley:

(if used inside an insulated space like a pocket, though, even a few seconds can be long enough to cause trouble… and it has no way to sense when that’s happening)

Incidentally, I tried checking the driver in one of my D4s.

Unlike the prototype reviewed in this thread my driver was NOT glued in. It was just press-fit. I was able to push it out using the pointy end of a flat toothpick inserted around the LED wires. This means getting to the driver to reflash it should be easy.

I love this light.

It should be renamed “The NutRoaster” or something like that. :smiling_imp:

I carry it in my pocket without any lockout, however I do make sure to only put it in my pocket with it turned off in a low setting. If it does turn on accidentally, hopefully it won’t ramp up to dangerous settings before I notice.

The button protrudes slightly, but does seem flat enough that I haven’t had any accidental activations yet. Keeping fingers crossed it doesn’t happen.

I don’t have anything to add, but I really appreciate the extra info and measurements! Posts like these make me sad that BLF doesn’t have a ‘like’ button. :slight_smile:

I eagerly await the Guide to Flow Soldering On Your Flashlight

Just put a little metal flat plate over the emitter, eh?

I popped mine out with the end of a match (not the striking end). It popped out pretty easily.

Hank mentioned he’s sending me a new Emisar so hopefully that will arrive soon. I sent back the defective one to RMM today so it will be interesting to hear what was actually wrong with it.

Is the paste conductive enough to run before it reflows fully? Maybe just stick the emitters on there and crank the power up to 100% until they reflow themselves.

I was thinking the other day……… geeeeez, in the wrong hands this is an accident waiting to happen. Like George Carlin said “ think for a second how dumb the ‘average’ person is……. then half the people will be dumber than them” I don’t think anyone that knows what they are holding will have problems short of an accident but think of all the folks(especially yunguns) that might turn it on without knowing that it is not just a ‘regular flashlight’.
I was in particular thinking of a young kid(3-5yo) that might turn the light on then drop it on something flammable. Its just scary.

My V2 219C Emisar D4 blinks/flashes twice whenever the tailcap is loosened more than about 1/10 turn and then re-tightened.

I couldn’t find anything here about a “feature” like that, but the thread about the “Noctigon Meteor D4” at the other light place says “LED flashes twice when tail cap screwed on with unprotected battery in.”

I don’t think that’s the case here, as putting a protected cell in my D4 did NOT get rid of the double blinks (but it did make me feel kind of stupid though :person_facepalming: ).

Anybody have any idea what’s going on here?

All three of my D4s blink twice when a fresh battery of any size is put in. (Samsung 30q, Efest 18500, Aspire 18350). I think this is just a feature to let you know the light now has power.

Did a little realtime usage test of the D4 with a first gen Aspire 18350.

First with the light completely static, no fan or cooling shining into my isphere and then another test with more normal usage, moving around, changing hands, positions etc.

Nice test CRX.

What emitters were in the D4 you tested?

Nichia version.

That is correct. It blinks when power is connected, simply to indicate that it has power.

Looks like 400 to 600 is its happy spot when hand held. Nice!

That’s my happy spot for real world usage. :+1: