BlueSwordM LED Group Buy 3: a 3V 5050 domeless Ra9070 4000-4500k LED, the perfect XM-L2/SST-40 (UPDATE 2: Something new!)

You’ve all been added :smiley:

@BlueSwordM, update me from 5 to 10 please. Doing what I can to make it happen.

Plus FOMO because I ordered 1/2 of what I ended up needing of the initial release of the DA0GF4RTS6’s and AZHU’s 219B D220 SW45K’s.

Done.

Would like to see beamshots of this first but I am interested.

I’ll try 10pcs

Interesting update

Interesting new information for you my friends.

I’ve actually found another manufacturer making a high CRI 5050 3V LED!!!

Even better from Rayten in some ways: single emitter die(so it should have higher intensity and no cross-die), Ra9580 (not a “puny” R9070) and a nicely lower VF for better regulation :smiley:

The only downside? Much higher thermal resistance(5C/W instead of 2C/W) and a bit lower efficiency.

Is it domed? Or domeless? (The new option that is a single die).

Domeless obviously :smiley:

I wouldn’t even bother if it was domed due to tint shift :slight_smile:

It sounds good. I’m not worried about efficiency all that much with a 5050 size.

Ye. Most interesting thing though is that if I believe the manufacturer’s datasheet, it’s got a decent bit lower Vf than the Rayten LED.

Now, it’s no 2022 XM-L2, but it’s still a very nice development.

Here’s the datasheet in question:

Now, I don’t want to be judgemental, but these graphs seem a bit… odd. Almost seems like they got it from somewhere else.

The link doesn’t work.

5C°/W is not very good, especially for a 5050 LED, that’s 219C level of thermal resistance (4.2~6.4), first gen XM-L2 is 2.5, new gen 0.75, SST-40 : 0.8

Yeah, that’s what I figured as well.

Here’s a fixed link:

I just wanted to know you guys’ opinion.

Man, I just wish Luminus had released a high CRI SFT-40 honestly. Imagine how much time we could have saved :stuck_out_tongue:

Datasheet does look a little suspect but if any of that is to be believed then these look like fragile dim emitters. 900 lumens at 3amps on a 5050? Reflow info doesn’t make them seem very robust…maybe the info taken altogether suggests that they wouldn’t be very good in a flashlight host where things are cramped and hot.

Still waiting to hear back again from my Luminus fellow on whether high CRI and/or lower temps are in the cards for those emitters but if so we’re looking at probably more than a year away. (I wonder if, say, Hank and Simon and Sofirn were to get together and request several reels if Luminus would make a special run……the dream team collaboration. lol)

To be fair, the LES seems to be quite small. I wonder how small it really is, which is one of the questions I asked.

I was going to be happy until I saw the thermal resistance specification.

I would be concerned with a low Vf and high thermal resistance, sounds like it would be easy to drive to death!

My impression is with companies like Nichia and Luminus you have to be regularly ordering hundreds of thousands of high power LEDs before any kind of customization would be on the table. Nichia won’t even sell their low yield special chromaticity bins to regular customers ordering in the tens of thousands.

@bob_mc_Bob, not hundreds of thousands.

MILLIONS.

Well then, these big emitter companies have just gotten a bit to big for their britches, haven’t they. :slight_smile:

I’m not in for a million…much as I might like to.

Anyway, some color information about the other LED:

Man, it’d be so nice if it had lower thermal resistance :confused: