SOL is cheaper, but nowā¦ Now they try to charge additional 10% fee from me (like for samples). And now there is cheap 3030 TRI-R SunLike leds. So, I can not say that it is cheaper, but in my web-site it is still more cheaper (8$ and 5$ per 1pcs 6w).
Better in what? I think, that spectrum of SOL and SAW is almost the same, you will not feell the diferense. But what about time of life with the same good spectrum? IF we have only violet crystals, even if some % of luminofor will die, it will be violet peak, SORAA have violet peak, Yuji leds have violet peak, and it is ok. If some % of luminofor will die in SOL? What type of luminofor will die first? And thrue what spectrum? 450nm (blue) will kill luminofor faster than violet? It will with 450nm peak after death of some % of luminofor? It is the questions, why I can not say that SOL (ChinaSunLike) is better that SAW (TRI-R)
SunLike, did you think about Vf binning the emitters you use and sorting them in packs for more balanced parallel current sharing? Any modern cheap multimeter can provide an accurate Vf figure. But since your leds are well thermally coupled, this may not matter much.
Are SunLike (SAW/SOL) emitters available through any of the cheap sites (eBay/AliExpress)? Didn't care to look for them yet.
About SunLike (TRI-R SAW). They want to have only 1 dealer per 1 country and 2-3 indernational dealers (for example avnet.com)
There is day of produse on SOLs leds. I have no any additional information about it. But I try to parrallel leds from the same batch. They have no shop on ebay/aliexpress/taobao/alibabe or etc. They have web-site (SmartEcoLightning say from Adam for good price)
Thanks. Iām just happy the statements were not backwards So how about this:
SAW = Original by āSeoul Semiconductorā in Korea (Sunlike product line using TRI-R technology)
SOL = Competitor by āSmart Eco Lightningā in China
Hello everyone! Iāve found several new interesting bulbs from Osram. Also they have added a āSearch by CRIā feature on their website which can be accessed by clicking on āShow all filtersā in the search form
Iāve tried it. Nice thing with filament bulbs is they emit light pretty much in every direction. This one is still a bit directional, in the opposite fashion to a usual LED bulb with diffuser which emits more towards the front. This bulb emits more light towards the sides. Much better for a fixture like this one where the bulb is viewed from the sides, but pretty bad for a suspension.
It is dimmable and doesnāt flicker. As far as color rendering goes, it proudly displays āCRI95ā on the boxā¦ But itās 2700K and I find that much too yellow. I prefer 3000K.
I tried this one. It looks pretty good. Nice 3000K light with no tint at all, looks even a bit better than the Philips 90CRI āLEDspot MV Value GU10 4.9W 930 36Dā (this is not the ExpertColor). I donāt know if they will last but Iām recommending it if you want really decent looking GU10 spots at a low price. There are 230lm and 575lm versions and another 5.5W 350lm version which I didnāt try.
Osram website does show the spectrum and even the type of LEDs used in the two spotsā¦ you have to click on āgraphics and application imagesā. Spectrum looks extremely close to ExpertColor.
In the 90CRI Osram spot, the lens at the front is held by three tiny plastic legs which can easily be popped off, exposing the LEDsā¦ it is a bit flimsy and totally not waterproof, but this could actually be useful, as it means the spot can be modded., maybe with another lens for example. Iāve tried replacing the lens with a round diffuser (ie, a frosted plastic christmas decoration) and it makes a neat 3000K GU10 bulb. Output is a bit low at 350lm though.
I have built a couple of E27 bulbs with a single Nichia E21 2000K not too long ago.
Iāll have a look if my Imgur account is still alive, so i can share some pics.
But my Ultimate LED bulb would be something like this:
Omnidirectional ānormalā looking E27 pear with frosted glass.
Not clear to me where to buy them thoughā¦ (anyone know?)
But these are LED filament bulbs, obviously.
I really like the concept, but iām always curious about how hot the filaments get, since they have zero heat path.
I donāt understand why LED filament bulbs are usually clear glass.
Frosted is much better.
> Someone here linked to it ā¦ Not clear to me where to buy them thoughā¦ (anyone know?)
Click on the price link in my post above. The website is in French, but it ships from Netherlands. I donāt know whyā¦ thereās always google translateā¦ Also you can search for the ref āOsram 4058075134485ā and youāll find shops.
Note I donāt like 2700K at all so I donāt like this bulb. But if you do like 2700K and you want 95CRI, itās quite cheap.
> I really like the concept, but iām always curious about how hot the filaments get, since they have zero heat path.
The bulb is filled with gas at higher than atmospheric pressure that transfers heat by convection. Not vacuum like an incandescent bulbā¦ However, convection carries heat upwards, so if it is mounted in a luminaire with the glass bulb upwards, the top of the bulb will be hot and electronics in the cap will be cool. If it is mounted with the glass bulb pointing down, electronics in the cap will cook. These lightbulbs are not really built to lastā¦
> I donāt understand why LED filament bulbs are usually clear glass. Frosted is much better.
If the bulb is visible then frosted is much better. If the luminaire has a frosted glass diffuser then the bulb does not need to be frosted. For wall mounted luminaires (example ), the bulb throws half its light output at the wall. The back of the luminaire is usually white or reflective so it reflects light back through the clear bulb and into the diffuser in the front. Taking this into account, a clear bulb will be much brighter than a frosted one.
In fact for a wall-mounted luminaire, a bulb that throws all the light to the front with a heatsink at the back would be niceā¦ but that wouldnāt sell because once you screw it in, most likely it will end up in the wrong orientation.
I donāt think frosting or even white powder on the inside costs a lot of Lumen.
Maybe you know / remember the Philips Argenta Tungsten bulbs of the past?
Do not buy on aliexpress led bulb kits! Buy on taobao!
There is one big problem with led bulb kits from aliexpress seller what I find. Plastic thing (where E27 carving). This plastic will die and crumble (turn into dust, will cracked) after about 6 month =( That was the reason why I bought 3d printer. I will do this part from poliuretan plastic. From taobao sellers it is still alive =) But I do not want to repeating this situation. It must work 20-35 years in my lamps!
So how about this:
:partying_face: :+1:
