[GB ended,discussion only] CRI > 80+ NICHIA 2000K-6500K [E21A/219B/219C/319A/144A/757GT-F1(Optisolis)]

Clemence, any chance you could bring back the sw40 219B?

Will work okay as long as the optic are either faceted TIR or OP reflector

- Clemence

Yes later next month with the next shipment

- Clemence

Wow, that’s great! Thanks.

Have you tried a quad E21A in the Armytek Prime yet?

EDIT: Ooops sorry, you meant Armytek Prime. No I haven’t :stuck_out_tongue:
Currently too busy soldering those MCPCBs. Time spent to solder a VR16SP4 equals to soldering 20pcs Sinkpads or Noctigons

- Clemence

ArmyTek Wizard Pro XM-L2

Nichia E21A 6500K R9080 & 5000K R9080

Next mod on the right……

:+1: :+1:
And how is the tint? I have a few of the E21A 6500K R9080 leds but have not used them yet.

Jos, did the 2000K packet arrived? The last 6500K shipment was relatively fast.

- Clemence

maukka’s test

No, it did not arrive yet, must be stuck somewhere. Usually packages show up again at some point, I’m waiting for that :slight_smile:

what would be the differences with the 6500 9080 and say a 5700k 9050 ?
I have a build but wondering on these two choices.
pro’s con’s?
thanks.

I see some D320 CRI70 E21 in your shop…
can we expect it to have 43% higher efficacy than D220 in your tests?
If yes, a quad would do 1000 lumens with over 170 lm/W in XM footprint….

We (me and Jensen567) tested the singles and quadtrix using those E21A sm505 D320 R7000 so we can related the 144AM sm653 E1200 R7000 results from earlier Djozz’s tests

Using this graph we can estimate lumen output, by interpolation using data sheet. The results is 2173 lumens at 11,2A (35,6 watt) and it was still climbing albeit at shallow rate. The peak estimated at 12,4A. The test stopped because my PSU couldn’t feed it no more.
That means a single E21A D320 output peak was 2173/4 = 543 lumens. My recommended max current is 80% of the maximum ~12A which is 9,6 A for 4p setup or 2,4 A for 1s (single). Single E21A D320 should outputs ~519 lumens at 2,4 A.

1000 lumens output for 4p E21As is an easy task and very safe for the E21A quadtrix. You should get 1000 lumens at 3,25A in 4p config / 1,625A in 2s2p / 812,5mA in 4s configuration.

Each LED will only get 812,5 mA which is way under the OEM rated current (1400 mA)

I hope you’ll get them soon. Jensen’s earlier order also took 2 months delivery time.

- Clemence

This is not an easy question unless you tell us your application first.

- Clemence

Clemence, I am considering modding a coast hx5. This light has a tiny board mounted on a tower. I wonder if I could cut just the very center of your single board and then scratch the white insulation in the right place to expose copper for electrical contact?

Counting pixels I redid your calculations and arrived at 1000 lm@3.02A with Vf of 2.91V. 114 lm/W. A far cry from my previous calculations…do you have any idea why is it so?

EDIT: I made a mistake. It’s over 3.2 A with slightly higher Vf. Still over 100 lm/W, but even farther from 170…

[quote=Agro]

[quote=clemence]

Use it as rough estimation only.
The real output must be much higher though. I used wall bounce method only to check the maximum current capability. Let’s wait Djozz test result if he has the time

- Clemence

OK :beer:

In my Armytek Wizard Pro testing, at low current (firefly modes) even the R9080 is more efficient than XHP50 CRI70. Then as the current went up, the efficiency got lower.

- Clemence