Over the years, we’ve always wanted to find a high CRI domeless replacement for the 3V XM-L2/SST-40 LEDs that are currently available.
Until now, it was practically impossible to find such an LED, for many reasons:
1. High CRI XM-L2s were only ever available in low color temperatures, and tints available were never really the best.
2. SST-40s were even worse: only available in 5000k and up, never available in high CRI.
3. SFT-40s, while domeless, are only available in low CRI 5700k and 6500k.
4. While the XHP50.3HI and XHP50.2 do exist in 3V, they basically don’t exist in high CRI or lower color temperatures because luminaire/light manufacturers probably don’t see a point in it.
So, let’s get on to the main subject: I actually found a manufacturer who’s willing to manufacture US a small batch of the LEDs with our own almost perfect specifications(more details below).
What manufacturer is it? Getian was my first try, but unless I commit a lot of money(100 000pcs), we’re not going to be getting a 3V 5050 High CRI LED from them any time soon 
It’s actually a smaller manufacturer called Rayten(Shenzen Rayten Lighting Co). They usually make stuff for automotive manufacturers actually: even though they’ve had the capability to make high CRI LEDs for a long time(movie and photographic sector for other LEDs), they’ve never actually done for the automative sector since most of them apparently went disgusting low CRI high CCT LEDs :confounded:
It is called the Rayten 5050W S55.
Anyway, before we go on, here’s the datasheet for the LED itself:
Manufacturer website:
Here is also a picture of the LED itself:
More information about the LED for those who don’t want/can’t download the datasheet down below.
LES and LED physical dimensions:
Electrical properties:
Luminous properties:
Let’s go onto what we really want:
Main specifications:
- 3V 5050 size
- 2.9x2.9mm LES
- Domeless
- 4000-4500k
- Ra 9070 —- 90CRI minimum, R9 70 minimum. That’s why it’s not the almost perfect LED: no R9 80 minimum currently is possible, but that’s fine still.
- Tint binning with a duv range of
0.010 to 0.000 —219B SW45k grade to perfectly neutral grade. I personally wanted tighter binning, but tighter than that is currently not possible with their equipment and expertise, although it should become better with time. - Decent efficiency for the 70CRI model at a minimum of 110-130lm/W at rated current and 85C derated(1A).
Overall, this is a very exciting LED, especially since we’ll finally be able to replace so many XM-L2 and SST-40 lights(Olight and older lights come to mind).
High color rendition, decent output, good-great tint(especially since it’s domeless and we have good tint binning) and an actual way to make all 5050 mega-cheap LED lights with angry blue emitters actually usable.
Now let’s get down to business: because we’re doing a fully custom run of the LED, that means we won’t be getting any samples, and the samples is the actual order.
I’m willing to take a slight risk this time since this seems to be the almost perfect LED for the things we want to replace with it 
2100 pcs of this LED will be ordered for this run. We may order more if demand is very high, and future runs might be considered if demand is consistent and manufacturers aren’t picking up this LED.
Pricing:
- 2.25$US/pcs for <20pcs
- 2.05$US/pcs >=20pcs
Shipping:
- 5$US internationally
- Other shipping options are available in the US and Canada at an extra cost if you order a lot of LEDs. Europe is a bit different in this regard because of much higher shipping costs.
Link to interest sheet is below:
Voice your interest down below so that we can finally get the 3V 5050 High CRI LED we’ve wanted for years!
Current # of LEDs reserved:
665/2100
Update 1:
1. It’s been confirmed by the manufacturer, but donut holes are not officially not an issue:
“because of the no dome lens design, classical focusing holes are not an issue with this LED design.”
2. QC will not be an issue:
” We work with a lot movie industry customers which have very strict specifications like yours, so it is not an issue.”
Interesting update 2
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
The only downside? Higher thermal resistance(5C/W instead of 2C/W) and a bit lower efficiency.
