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

I’m on board with 4500K, too…wonderful temp when you can find it. I’m more of a 5000K guy usually but good 4000K is ok, brushing up against as warm as I like. 4500K is like HID crisp without being white-white or harsh.

Oh I agree! I’d prefer a nice 4500k over a green 4000k. But ultimately I’d love a slightly rosy 4000k!

Any idea on current handling and output?

Current handling should be at the absolute minimum on par with the XM-L2.

It’ll obviously be able to reach much higher power levels since it’s a flip chip design rather than having to deal with bond wires, so that’s nice at least.

If I were to extrapolate based on the 70CRI version, I’d say 1000-1100 lumens at 10W 85C, and slightly higher at the rated 25C.

For the 90CRI version, I’d say around 700-800 lumens at the same power, although we’ll have to wait until we get to manufacturing and testing to see what the manufacturer gets on their end, and then see what we get on our end.

I prefer 4000k but anything is better than the current 6500K for sft40 and sst40.

Yeah, and while I was tempted to get 5000-5500k, I think that was a bit much.

4000-4500k on the other hand is :disappointed:

Actually tolerable general use CCT.

5000k is perfect for the day, but too cool for the night.

3500k is good for general evening use, but too warm for the day.

4500k is my own sweetspot.

I’m in for 10.

Added.

In for 20.

I will take 10 pcs, thank you.

Added, and updated.

So, is there anyone who thinks that I should add the ability for public people to add comments? That would certainly be nice to point out mistakes.

20 for me, please.

Will you send the leds as a letter to Europe? All international shipments are getting taxed now but letters may be an exception.

@Skylight, yes as besides, we’re not dealing with massive sums of money, and it’s the only relatively affordable and easy way I can ship to Europe.

Added to the list.

A letter is perfectly fine, thank you.

In for 10 pcs

Added.

In for 20

Added.

Only about 1000-1500 LEDs are left before we can begin the order process :smiley:

I will take 10.

Added.

Good news:

“I have an interesting question: can you manufacture very low color temperature LEDs after this batch?

By low, I mean <2500k(1800-2200k).”

“Sure, no problem making them.”

I am in with 10 pcs.
Thanks BlueSwordM for your great work about that to bring to us that new Hi-Cri LED.