Emisar D4S review

Thanks for the beam shots. I’m not familiar with the PL47 but is this indicative of how they would look and perform in the D4S? I’m surprised the SST-20 isn’t closer to the XPL-HI in terms of output and beam profile.

This D4S is marvelous! i have read the 52 pages of this post and now i want one with the SST-20 5000k!

I'll think i just wait a little bit for some beam shot of the SST-20 5000k emitters added recently.

Ty for the nice review Toykeeper, and too Hank as well for this nice flashlight.

Now i just need to be strong and patient.

Ordered a D4S with sst20 3000k. Already have one with sst20 4000k which i like.
But i thought i might like 3000k. I Was about to order the M43 with 3000k, but not sure i Will like it. So i ordered D4S instead to try it out, because D4S is cheaper. :smiley:
I also ordered the Another M43 in sst20 4000k. :money_mouth_face:

Anyone has the 3000k yet?

Hi,
Quite a lot of reading :wink: But, which led should I use in terms of brightness up to 5000k? SST or?

Brightness is the highest with the XP-L HD.

However, for best usability in all conditions, the SST-20 5000k would be your best choice.

Is it noticable difference? How many lumens? I guess SST is more focused, giving this light a little more throw?

The difference in lumens is not noticeable.

And it is more focused, and does give a bit more throw, making it more usable at lower power.

Thanks! :slight_smile:

Yeah, I agree.
4000k is my choice though.

I don’t know how the other leds performs and what type of beam they have.
But the SST20 has a really good all around beam i would say. I love mine. :slight_smile:

If you unscrew tailcap for a sec and then turn the light on, it will come on in the highest 3x7135 right? and this is the most efficient mode for the amount of lumen you’re getting. My question is why is that? why if you bump it a little higer it gets less efficient?

Because the FET is direct drive and is regulated through PWM, if you are beyond the max level of the regulated 7135 chip then you are engaging the FET and this means you have the full amperage involved only it’s pulsed. Thereby, less efficient. :wink:

I really like this light.

ow oke :slight_smile: I get it now. Thanks. Is that a reason people dont like cheaper lights with pwm for modes instead of regulated? and also flickerg in low modes right…

On some older or cheaper lights, PWM was slow and visible and unpleasantly like using a strobe light. Also, it tends to be less efficient than a true constant current circuit.

But on newer lights with faster PWM and multiple power channels, the visual difference is beyond human ability to perceive without tools, and the efficiency difference is relatively small. So there haven’t been a lot of complaints about it lately, except from people who are still thinking of the older models which weren’t very good. And a few who really, really care about efficiency or sophistication.

Annnd, most of the cheaper lights also have the blinkies on the main menu, no way to run through the modes without encountering Strobe, SOS, and Beacon. That gets really old really quick.

I just ordered a D4S with an SST20/5000K emitter. I have several fresh 26650 batteries at home to chose from.

What performance differences might I expect from these batteries? (No brand names below, just their advertised specifications):

Is their any risk to the emitter or driver if I use #1?
Will #3 provide enough amperage to realize the advertised output of the D4S/SST20 ?

1) 4,350Mah; Unprotected; Hybrid IMR; Max. Discharge current: 47A (5 Sec. ON /30 Sec. OFF);
Max. Continuous Discharge current: 36A (With cut off at 80C).

2) 5,250Mah; Protected*; Hybrid IMR; Max. Constant Current Discharge 15A (Protection circuit - cut off at 15A). *Note: This battery might be too long to fit: 69mm.

3) 5,750Mah; Unprotected; Hybrid IMR; Max. Discharge current: 30A (5 Sec. ON /30 Sec. OFF)
Max. Continuous Discharge current: 22A (With cut off at 80C).

Thanks in advance for your guidance.

The brand names are pretty critical for your question, just stating the printed capacity doesn’t give us any idea if the cell can actually meet the printing on the label.

Number 3 probably won’t deliver the specced output, difficult to say, again, without knowing who made the cell. Number 2 probably won’t either. Protected cells rarely do well with FET drivers. So it would look like, on the face of it, your number 1 cell will be the best performing. Blind guesswork of course.

So many tests of cells in net, just look for it, many people check cells. How is your emitter colour? I just ordered the same.

DB: Based on your thoughts, I will use the #1 cell.

Apologies. I would have given the brands, but they are all rewraps - all Orbtronics. Orbtronic, to its credit, seems to rewrap only quality, proven cells. Sol, the owner, makes his living on that reputation and his personal, knowledgable service. All the cells I have purchased from him have met or exceeded the specs I can measure. (I buy from him because the other reputable U.S. vendors won’t ship to Alaska. He gets the cells to me in 3 days - and from Florida no less. Costs more, but that’s part of living in Alaska.)

Kajman - I have not received the D4S SST20/5,000K yet. Should arrive in 2 weeks. When is does I will try to post some beam shots - comparing it to my D4S XP-L HI V2 3A (also 5000K). I bought this additional one hoping for a bit more throw distance