D4K triple channel version will be available soon.

Great idea! I may order another with that combo and three Osram Greens.

K9.3 Came in today.

Looking forward to reviews of this light with brightness/runtime graphs.

That switch is cool looking. What color is that?

Wow I’m jealous. I have three on the way. What emitters did you go with?

Looks like warm light for the switch color, same as what I got in my K9.3. I got the E21A 4500k with SST-20 2700k on CH2.

Nice! Here are the 3 I have coming. Was very tough to decide

Color Black
Switch back light color Red
CH1 (9 inner LEDs) E21A, R9050 Warm White, 2000K
CH2 (3 outer LEDs) SST-20 Deep Red, 660nm
Color Dark Grey
Switch back light color Green
CH1 (9 inner LEDs) E21A, R9080 Warm White, 2700K
CH2 (3 outer LEDs) W1 Yellow (Osram KY CSLNM1.FY)
Color Green
Switch back light color Cyan
CH1 (9 inner LEDs) Neutral White – XP-L HI V2 5D, 4000K
CH2 (3 outer LEDs) SST-20 Deep Red, 660nm

Did a quick comparison shot of some E21A tints. These are all from Hank in different KR4/D4v2 variants. Sorry, don’t have any 2700K or 5000K.

I’d like to see the 2200K come back. I think I prefer it slightly over the 2000K. The difference is subtle though.

Thank you Rayoui. That’s a great way to get a feeling for choosing the right tint. The 2000K / 2200K tints will be great to substitute any real candles in one‘s living room. Just fire up the candle mode in K9.3 and enjoy the cozy atmosphere. :LOVE:

You could do a mix with 3x2000K and a higher CCT. For example with 4500K -I get 2269K duv 0.0060 (calculated from independent measurements at 1.25A per LED). In my opinion a negative duv makes warm temperatures look so much better.

Edit : used the wrong measurements, 2506K duv –0.0094 is the right result (makes more sense), so a lower CCT than 4500K should be used, 3500 (~2350K duv –0.0040) or 2700K (~2180K duv –0.0016).

Anyone with a KR1 and is able to kindly measure the reflector for me? Am wondering if it will fit a D1…

That’s certainly an option. I might do this if I decide to pick up another one.

I have an FW3A that I mixed 2700K, 3500K and 5000K LH351D and it resulted in a nice 3600K combined CCT and a beautiful tint. I want to do something similar at some point with a KR4. I just hate messing with the aux board and those tiny wires.

I’d also be up for another run of 2200K. They had great tint, and the difference between 2000K was noticeable. I’d probably buy another K9.3 and KR-4 with those emitters. I also reset the W/B, if you don’t mind to 2200K to show off some of that rosy tint of the 2200K E21A. I believe the 2000K from Hank’s second batch was on/slightly above the BBL while the 2200K was BBL.

That is warm white. Amber wasn’t available when I ordered or I would have

It’s the warm white option on the brass version :+1:

I measured 2000K and 4500K a few weeks ago, 2000K was on the BBL : E21A 2000K and 4500K from intl-outdoor color rendering - Album on Imgur

Looks great! I might pick one up

I’m a huge fan of the 2000K. My KR4 is sitting on my desk right now, filling my office with soft golden light.

Will you be getting any cyan 18350 tubes for the kr4 Hank?

All copper KR1 has been listed: All copper KR1 tail e-switch 18650 pocket thrower

holy crap! . There goes my monthly budget!