WTB 6500k 90+ CRI LH351D or SST-20 bare emitters

beastlykings · 2018-10-28T22:40:16.000Z

I’ve tried googling extensively, both in general, and this forum, and I’m having no luck.

I’m looking for some 6500k 90+ CRI LH351D or SST-20 bare emitters. They’re for my buddies H03 I modded with a TA driver from Lexel. He’s decided he loves CW. I currently have a couple Nichia emitters of that same spec, but I bought those before I learned that 219Cs don’t like to be driven by a FET in a single emitter config.

I don’t care that much, emitters are cheap, and I’ll put the 219C in there first while I search for replacements, and if they burn out they burn out. But the right choice is the LH351D, or an SST-20, I think.

I found some SST-20 at Kaidomain but they seem to be only 70 CRI. From what I can tell, they do exist in 90 CRI but I have no idea where to find them. I’m pretty new to all of this.

Sorry if this is a stupid request, but any suggestions?

Bob_McBob · 2018-10-28T23:04:08.000Z

5000K is as cool as it gets for readily available 90+ LH351Ds. Arrow, Digikey, etc. stock the 6000K (SPHWHTL3DA0GF4PQR6), but only by the reel. 6500K only seems to exist on paper right now. A much better option would be replacing the emitter with quad E21A in sm653. I don’t know how well these work with Lexel’s driver though.

ERKX

Product Page | ERKX

BlueSwordM · 2018-10-28T23:11:46.000Z

1. Sorry there aren’t 90CRI SST-20s available in CCTs above 4000k.

2. LH351D 90CRI emitters aren’t above available above 5000k from any of the major distributors for now.

The one emitter which does go up to 5700k 90CRI with a 3V emitter is the Luxeon MZ.

beastlykings · 2018-10-29T03:04:25.000Z

Thanks for the info guys! I knew it was harder to make high temp high CRI emitters, but I didn’t realize what I was looking for simply isn’t available.

I had seen that E21a, but worried about flowing them myself and burning them up, they are super close together. I also didn’t know how Lexels driver would work with them, I barely understand how all that works.

I didn’t know about the luxeon mz, that looks interesting, but seems like it has really high amp draw? Kind of inefficient?

BlueSwordM · 2018-10-29T03:09:12.000Z

Oh yeah you are using a FET, not a regulated driver. Sorry for that.

You could just perhaps get him a 5000k 90CRI LH351D and be done with it. That would work well either way:

Digi-Key Electronics

SPHWHTL3DA0GF4RTS6 | Digi-Key Electronics

Order today, ships today. SPHWHTL3DA0GF4RTS6 – LED Lighting LH351D White, Cool 5000K 3V 1.05A 128° 1414 (3535 Metric) from Samsung Semiconductor, Inc.. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

beastlykings · 2018-10-29T03:12:28.000Z

That’s what I’m thinking, he’s got a 5000k 219c D4, and he likes that, so he’ll be fine with a 5000k lh351d. He can get a colder light another time haha. Thanks

Bob_McBob · 2018-10-29T03:13:24.000Z

Clemence will reflow a quad E21A for a grand total of $1.50. He’s an expert and it’s probably one of the best value services in the entire flashlight modding world.

ERKX

Product Page | ERKX

BlueSwordM · 2018-10-29T03:14:41.000Z

One problem with using Quad E21As is their very low VF, so a FET driver would be problematic as well with these.

Bob_McBob · 2018-10-29T04:16:22.000Z

Yep, that’s why I was worried about Lexel’s driver. They work beautifully with the stock H03.