Emisar D4S review

Do you think it would be sensible to mix SST-20 3000K 95CRI and SST-20 4000K 95CRI on the D4S to gain a beam profile with 3.500K color temperature? Would this even work as the 3000K version is probably subject to become warmer and less efficient in conjunction with the 4000K SST-20 at full brightness level? (...thinkin' about Vf, thermal specs, maximum current, etc.).

Whew to my eyes that is one green beam; doesn’t matter if it throws a mile, no ty.

On a good note I ordered a 3000k SST20. Super excited :smiley: about that. I.already have 2 D4S, a Nichia and XPL-HI 5000k. I hope the SST20 is as nice as djozz found with his testing! Should be amazing in this quad! Thanks again Hank!

@Lux Perpetual, since the VF usually changes significantly when going with different emitters or higher CRI emitters, going with 2x 3000K and 2x 4000K SST-20s will be about perfect in terms of tint mixing compatibility.

@Lux Perpetual,
Keep in mind that two one other thing will happen when mixing tints:
+Tint will fall lower on the BBL line, so less green, more purple

In general mixing just tends to average out the CRI. So no fear in getting worse CRI if both sources are high CRI to begin with.

Thanks for correcting me Maukka, must have misread a previous post.

Of course there are exceptions. Such as combining a red, green and blue will naturally result in a much higher CRI than any of them separately. But mixing is usually done with emitters having similar characteristics in the SPD (i.e. they have their peaks and valleys at the same wavelengths, just in different amounts).

I was about ready to order my D4S with 5000K XP-L Hi, and now this appears.

Is it correct that the SST 20 provides about the same performance, without the $15 upcharge?

Assuming I’m fine with the slight increase in throw, are there any downsides? Heat? Beam pattern?

Yes, I think that should work.

I also suggested a while back that Hank should consider offering LH351D sometimes, and should offer a 2x4000K plus 2x5000K option to get a tint-mixed 4500K. This should provide a CCT closer to what is most popular, and should also help make the tint a little less green.

I really hope Emisar will release a 21700 version of D4s.

The only reason I’m not buying current D4s is it’s too big for pockets. I just received my Fireflies 21700 and it’s perfectly pocketable, even fine as headlamp.

Maybe a poll result will help convince Hank as to what the flashlight community likes?

I wonder if 21700s are the future judging from the variety that have surfaced. 30T for maximum output. 40T for a nice balance of power to capacity. 50E for capacity and more. It’s slimmer and nearly the same capacity as a 26650 too. We seem to be benefiting form vaping and their need for high drain cells.

In terms of flashlight size, Imo a 26650 light just feels good in the hand. Not too narrow, but not difficult to get your hand around. Its a good general purpose, long runtime size.

In terms of pocket carry though, the biggest ill carry is an S2+

Id rather have to change batteries than deal with constant unnecessary bulk, but thats just me.

Now if there was just a 21700 tube/tailcap option, id pick that up in a heartbeat.

well why not just buy it the regular d4 then ? only thing 21700 would provide is more runtimes perhaps vs 18650… but those cells arent that popular in lights yet…

I’m interested to see what the 3000k SST-20 is like in this light. I like warm tints, so I ordered one with the 4000k XP-L HI because that was the warmest tint you could get in it at the time. I wonder how these would work in it as well: Link I would order another if these were offered in it. Warm tint, high CRI, and also should be ~4000 lumens like the other XP-L HI options.

The appreciable bulk of the D4S head vs the D4 makes for longer runtime at higher output levels.

I just received the Emisar D4S XPL HD v6 version and the shape of the beam is fantastic….perfectly even transition from the center of the beam to the edges. Just like I love. I have another with the XPL HI on the way so can compare, but I can already say beating the HD beam profile will be next to impossible to my tastes.

I was hoping someone with the HD would comment.

Please post a pic side by side with the HI. Thanks.

This is kind of a tangent, but one small note…

The “S” in D4S is a capital letter. Same with the D1S.

Name

Quantity

Description

D1

single

one Emisar D1 light

D1s

plural

multiple Emisar D1 lights

D1S

single

one Emisar D1S light

D1Ses

plural

multiple Emisar D1S lights

D4

single

one Emisar D4 light

D4s

plural

multiple Emisar D4 lights

D4S

single

one Emisar D4S light

D4Ses

plural

multiple Emisar D4S lights

It can get a little confusing though, guessing whether a small “s” means plural or a different model, so for clarity it’s probably best to avoid the small “s” entirely and use other words around it to remove ambiguity.

… and if I ever have another client who wants to end their product name with a “S” suffix, I’ll try to steer them toward a less confusing naming scheme. :slight_smile:

Add the aux LED photo for reference