also with one Red PC channel (Or Deep
Red PC) + one Warm white channel?
@tactical_grizzly, very very nice.
I’ll be patiently waiting.
Finally an upgrade to my trusty Fireflies E07 
I just don’t like linear+FET drivers all that much anymore.
Ultra low lumens that way, not worth the trouble for either channels.
You can’t expect more than 600lm from the E17 1850K R9050 4pcs anyway in the D4v2, not worth drop it to 300lm or less.
Good to know. Same 600 lumen for the E21A 2000K 4pcs in D4V2?
Oh no, please stop all this goodness! My bank account can’t keep up!
The boost driver which is currently used in K1, DM11, D4S V2 B35AM version has not been advertised much,
Efficiency is 90-95. (Actually it is about 1 higher, at 100% there is 60 mV loss on the input wiring to the driver.)
The same driver will be used in KR1, KR4 boost version in the future.
@hank, I have some questions:
1. Are you affected by the current lockdowns?
2. Have you thought of doing pre orders at one point?
The D4S V2 can be order with B35AM LEDs?
Are there any plans to release a pocket Kx model with USB charging and a B35AM option?
This is a very limited option. They may be sold out.
Announcement: KC1 keychain light is available now - #4396 by Hank_Wang
Hi, the lockdown is only in some cities in China, there could be only 2~3 days delay for the orders.
It will be for sale as soon as it’s available.
KR4 with boost driver sounds intriguing! How will the MCPCB be configured (hopefully 4S)? In combination with 4x XP-L HI this could be a very useful endurance monster.
Hank lives in Nanjing which is not under lockdown
I didn’t know, but thank you fogofwar again.
I just wanted to know if he was affected somewhat, as I don’t exactly know what shipping ports and what routes are being affected specifically.
Pre-orders are the worst. Hank, thank you for only releasing products when they are actually available.
Any chance we will see a KR1 with an XHP50.3 HI? Mouser sells partial reels and there is a 90 CRI version available.
The MCPCB is 4S configured indeed.
Hank, what will the current output be for the 12V KR4 boost driver?
It’s 2A per LED.
Very excited to see you offering your lights with these drivers.
At 2amps per LED, does that mean it will be offered with e21a LEDs?