KC1 keychain light is available now

I wish, but for his last restock a few days ago they didn’t have 2000K in same the flux/color rank as before, quote from when I asked him :

Why is E21A so special?

Why shold I buy this LED?

Which version of 4 available will you buy?

If having the highest CRI is your #1 attribute then you would want this. If you value output/efficiency/beam profile above CRI then you may be better served with a different LED, just depends on use case.

Color temp is personal preference but since he has a few to choose from you could combine them to make nearly anything between 2200K and 5000K

Hi Hank, do you plan to release a KR4 tailcap with lanyard hole? Like the D4v2?

Probably not since it comes with a lanyard clip.

And there is a lanyard ring comes with the light which many customers may not even be aware of.

Agreed.

To expand a little more on those tradeoffs:

The E21A can’t handle as much current as other options, so the KR4 with these emitters is limited to 5Amps (no FET), which produces about 1200 lumens (for the 5000K version). Other emitters that can run with a FET to current output can produce 3000-4000 lumens in the KR4.

The first sample of the KR4 that went out for review with E21A’s in it had visible tint shift with the stock optic. A frost optic mostly fixes this, although makes the beam wider and less throwy.

The efficiency of the E21A emitters is good for such a high CRI emitter. However, a low CRI emitter is capable of something like 30% higher output.

The frost 10623 is the default optic for the KR4 E21A version, instead of the clear 10622 optic.

Good choice. Thanks for the update!

sorry if the question had been asked before,Do emisar d4sv2 Ti will have e21a option also?

Thank you for your answers regarding E21A emitter.

Hank will the green and cyan d4sv2’s come back in stock, or were they a limited run

Hank, can’t the E21a be driven with partial FET, like the 219b?

Any plans to put E21a in D4V2 Ti?

Any plans to make a Ti KR4 with E21a?

Thanks for your time.

Hank, I never got a shipping notice for my KR1 order placed 5/28. Did they all get shipped already or have some not yet shipped? Thanks!

Hank,
Any ETA on the new clip?
Wanting to purchase an e21a KR4 and a W2 KR1 but would prefer the new clip.
Thanks.

I’m afraid they are limited run.

The clip design has not been finalized yet, I’m afraid it will take at least 2~3 months before it can be available.

E21A can not be driven even with partial FET. There will be Ti KR4, but no E21A in D4V2 Ti.

Ordered Kr4 e21a,will order Ti Kr4 e21a(hopefully Ti body with copper head design) as soon it become available.Thanks for your time answering our questions.

I haven’t got any shipping notice for my KR1 order from June 4 as well.