Round Die LEDs List

[Lumencraft-Matt (Formerly: vestureofblood)]

Let’s compile a list. I’m speaking of single die type emitters, not COB. If you have a source for the LED you mention feel free to leave a link as well.

I will start… I’ve created a google sheet that I’m adding to. I would love to have a few volunteers to help EDIT the sheet. If you want to have edit privilege’s PM me your email and I will add you as an editor.

Round Die LEDs List

[LuminPro]

There’s also:

W5050SQ3

And the FFL505A

These are the only ones I know of, including some in the spreadsheet.

[QReciprocity42]

The FFL505A is a funny one. It has a round light-emitting surface, but technically a square die. It only appears round because the corners of the square were covered with opaque silicone mask, which is part of the reason for its low efficacy.

EDIT: it actually has a round die, the FFL350RD is the square one. Thanks crbnfbr and koef3 for the correction!

[Lumencraft-Matt (Formerly: vestureofblood)]

Excellent, I have added both W5050SQ3, and the FFL505A. I’ve also included a line on the spreadsheet that links to independant tests of the LEDs. I found some here at BLF done by koef3LED tester

Thanks for the input guys.

[crbnfbr]

@QReciprocity42

The FFL505A is a funny one. It has a round light-emitting surface, but technically a square die. It only appears round because the corners of the square were covered with opaque silicone mask, which is part of the reason for its low efficacy.

I thought it was only the FFL350RD that had the square die and silicone mask. I thought koef3 had confirmed the FFL505A was an actual round die.

edit: Yeah, FFL505A does have an actual round die.

[koef3 (LED tester)]

Only the FFL350RD has round die masking. The FFL505A has a real round die chip.

[QReciprocity42]

Thank you for the corrections, I have revised my original comment accordingly.

[LuminPro]

Oh.

I got confused for a second.

[Lumencraft-Matt (Formerly: vestureofblood)]

Cree has announced the release of the XP-LR and XP-GR. This gives me hope that there will be more competition in the round die LED space. If cree can make any advancement in color blending, efficiency, CRI they have my full support

So far the best small round LED I have found that I can get in warm tints is still the LMP W5050SQ3. The 3000k version has good blending and respectable output, but surprisingly low CRI (only 70)

koef3 has already started a thread here breaking down the characteristics of the LED.

New Cree LED: XP-GR / XP-LR (round die 3535 LEDs)

At first glance it looks as if Cree has purchased existing LED chips with a round luminous surface to build its own LEDs with. These are not built in flip chip design. Very few CRI/CCT options available (cool white 70 CRI). Thermal resistance for XP-GR is higher as for SFT-25R (1.3 vs 0.8 °C/W), max current is 6 Amps for both. The XP-LR is more or less the same as SFT-25R in terms of performance (thermal resistance and Vf range), the LES is also exactly the same size. The tintshift with risi…

XP-LR Datasheet: https://downloads.cree-led.com/files/ds/x/XLamp-XPLR.pdf
XP-GR Datasheet https://downloads.cree-led.com/files/ds/x/XLamp-XPGR.pdf