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

If you can get a Wechat contact, I can communicate with them and see if maybe they would be willing to send me a sample. Shipping should take only one day since I’m in the same city. I’m not sure if they have some available already though.

I can test lumens and candela (I’ll probably put it in a C8 size body), but can’t test CRI or tint.

@fogofwar, problem is that samples don’t exist for our specific CRI and other color don’t exist, but yes, you could check out the beam profile.

Pavlo and Rayoui have been added.

I’m interested in 5

Nice!
Do i have to sign up here or can i fill in the Google document later?

Definitely interested in a few

In for 10.

Given that there is a small gap between the dies, I can not think of a reason why there will not be a visible donut hole in the hotspot when used well focused in a smooth reflector, like we do in flashlights. It may be limited but it will be there, and an OP reflector may be needed to smooth it out.

The manufacturer may not realise that that is how a led is often used in a flashlight, as opposed to general lighting/car uses.

10 for me :slight_smile:

In for 10.

Thx

+1 and IMO it’s necessary to test this before making any large order. If fogofwar can test a sample that would be great.

In fo 6.
:+1:

Well, as for why I trust them and do not worry, similar LEDs like the XHP70/XHP50 had this problem being domed LEDs with gapped dies, but when being dedomed, the problem went away.

But yeah, that would be our best shot.

Luxeon MZ on the other hand has a hole with reflectors.

B35A too.

Wait, the B35AM has holes?

Isn’t it a singular large die with multiple small emitters all under the phosphor?
If so, that is interesting.

It has 4 E21 dies

Yeah, but it’s all under a single phosphor.

Weird if it causes issues.

Courtesy of Clemence.

It works nice in my S21A with OP reflector.

Oh, there are actual gaps between the emitters.
I did not know that.

Well, I’m currently in talks with fogofwar so he can get samples :smiley:

Yeah OP is fine, it only produces a darker spot with SMO reflectors and some clear TIR optics.

Can probably just adjust the reflector height a little until the spot goes away.