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

I prefer 4000k for general purpose flashlight. 2700k or lower for bedtime use.

Put me down for 20!

In for 10

I’m in for 5

@SKV89, lordlupulin, storbod, all added.

In for 10. Thanks for organizing.

Put .e in for 10 in the US.

I’m in for 20.

If the sample shows positive results, I’ll increase to 40.

I’ll take 50 if fogofwar is able to confirm low CRI samples look good in common optics and OP reflectors.

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