Output and voltage test of 5000K and 3000K Nichia Optisolis leds

The table is probably incorrectly marked. Current through the led (A)? 240lm at 1000 Ampere?

Yep, it should be mA, I will correct it tonight :slight_smile:

Very promising. Never thought they would survive beyond 200mA!
Nicely done Jos. Thanks for testing

- Clemence

Well well, a quad would yield enough output for a work headlamp and should be compatible with at least some stock optics.
Thanks djozz!

Excellent results.I ordered one of each to try in a DQG Fairy 10180 keychain light on your 119 board,cut down,if it can be.I figured 60 or 70 lumens was doable.Now it looks like 4 optisolis’s on a VR16 board 3v,would be great for a general headlamp,500 to 800 lm on max.The same order has 4 E21’s on VR16 as well.
This was an unexpected,and pleasant surprise.Thanks Djozz and Clemence.
Edit:Agro beat me to it!

Thanks Djozz, very useful info!

What did you mean by this: “The light green specs in the 5000K die I have never seen before ”?

I have been looking at a fair amount of different leds through the microscope and the phosfor materials vary and contain a variety of coloured specs, and this green coloured spec is new to me.

I see, thank you

I added the S2+ build in post #2, really happy with that :slight_smile:

That was a real fast built Jos. You must be very excited to get things done in less than half a day!

- Clemence

Monday is my day off work :-), that is until 3 o’clock when I have to pick up my son from school. But the build did go very well, that is not always so.

:+1:

I just noticed something in your final built pictures. I’m really curious and somewhat itchy here….
There are… (counting)… five solder balls in between the LED chips. :laughing:

- Clemence

Do some side-by-side testing with another flashlight pointing at some coloured objects, then we can see if the colour rendering is significantly better :slight_smile:

:innocent:
I tried to pull one off with tweezers and it was stuck, so I just left them there.

I can try something like that but I doubt any difference shows up compared to Nichia R9050/R9080 leds. Even with my eyes I do not see anything special if I do not look for it, these differences are subtle! What is at least clear is that qua tint this led does not have the typical Nichia rosy-ness.

Btw, talking about ultrahigh CRI leds, does anyone know a source for Seoul Semiconductors SunLike 3030 leds? I know that they are on the market because they appear in lighting products, but I do not see bare leds anywhere.

Try future electronics

Thanks for the test! Also, a nice mod!

I wish there was a version with only a single die in the center. That would be great for my old 2xAAA Minimag with a Terralux Drop-In. It has a really old, similar looking mid-power LED and a suitable smo reflector.

djozz, do you think a typical OP reflector is forgiving enough to produce a good beam off a single Optisolis LED without any further messing with a lens? The options that I have in mind are aleph LE with either the triple Optisolis board I just gor from Clemence for a med power mule only, or with a single Optisolis board good for both a low power mule and, say, a Haiku.

I do not think that a single led in an OP reflector will produce a good beam. And especially from a flashlight that is made for a good tint, you want the beam to be smooth as well.

I tried to EDC the Optisolis S2+ for a few days and my conclusion is that it is not good for that, and everyday light source needs to be a bit throwier than this. But (apart from truly appreciate art works and nature) it is great to check which of my socks match (all my socks are dark, from blue to brown to several tints of black).