Thanks for clarifying. I also notice the 3 steps Macadam Optisolis adheres closer to the BBL than earlier Nichias.
As a side note: looks like the Optisolis use two different blue pumps (or violet), 420nm for CW and 440nm for WW
I received my sm203 E21A today and immediately put it in an S2+, together with a 4x7135 biscotti driver. The reflow went well and soldering the wires was hard (as expected), I had to hold my 60W soldering iron on the pcb until the whole pill heated up.
The tint is not as orange as I thought it would be, but it is the warmest I’ve seen yet from a led and it’s very easy on the eyes, I think this will be my bedside lamp from now on. The beam shape with an orange peel reflector is pretty good.
Some pics (tint is warmer in reality):
Spent an hour playing with the 3k, 4k and 5k e21s. Somehow the soldering just went easily this time.
Now I can say that the funny patterns of tint shift I reported earlier were not real. Each cct has very visible tint shift. On the other hand, it is much less of a problem to me as compared to that of 219b 9080. First, the shift is from neutral to green rather than from rosy to green, and this is much less annoying. Second, the green rim starts developing considerably farther from axis, so it would be better cut off in a mule head.
Overall, I am very pleased with the 3k and 5k, not that much withthe 4k but I think this is just me. I just prefer either incand like or true daylight tints.
Will be ordering the 6.5k and 2k versions right after I got the incoming drivers and finalize the host.
Clemence, thanks much again for making these leds and the boards available!
EDIT: Ooops sorry, you meant Armytek Prime. No I haven’t
Currently too busy soldering those MCPCBs. Time spent to solder a VR16SP4 equals to soldering 20pcs Sinkpads or Noctigons
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.