Found another 90CRI strip. I asked for the 3000k version and they showed me a test report showing x=0.4275 and y=0.3814, which calculates into a DUV of –0.008, which is very nicely rosy! Perfect for the living room or bedroom use!
61lm/W
good God…
That’s why I don’t buy chinese LEDs anymore - efficiency-wise they stand still for the last 10 years.
The Samsung LM301B are over 200Lm/W and some other LEDs are very close to 100CRI/Ra - It’s just a matter of time until they get combined.
That said, the 80CRI of the LM301B is not bad, I have several 4000K modules, but 3000 and 5000K as well - I would use them for house lighting anytime.
Where do you buy the Samsung strips? Are there test results? Wjere do you find led strips with 100CRI?
Im interested not just in the CRI or R9, the tint is just as important if not more. I cant stand yellowish greenish tint. It needs to be under BBL for me and the ALI one I posted has a DUV of a whoping –0.008. That might be the reason why the efficiency is not good. It is like a Nichia 219B 9080. Beautiful tint but poor efficiency.
These are not LEDs but strips with current limiting resistors. Possibly driving the LEDs at more than optimal current. At 3000K CRI 9080.
61 lm/W is not really good, but it’s not particularly bad.
You cannot compare efficiency of LEDs with LED strips. The resistance (losses) through the strip is tremendous. It’s like comparing the horsepower at the crank vs at the wheels but many times worst. Many of these 16.4’ strips actually have visible dimming at the end of the strips due to resistance losses. To me the tint is even more important than CRI for interior lighting and most of the ones I bought were too yellow/green or did not have enough red/rosy tint in them for my tint snob eyes. During my house remodeling I bought about two dozen different types of LED strips from Amazon and local stores including cheap and premium brands and weren’t happy with any. I then found a random low cost $10 strip from a website I never heard of at the time (Aliexpress) and bought it. It was the brightest and best tinted (not sure about CRI) led strip I’ve seen yet so I ordered another 10 because I used it in all my rooms and kitchen.
Now if anyone know of any LED STRIPs with good tint (negative DUV) and 90+ CRI with better efficiency or higher brightness than the ones posted above, regardless of price, please post. I’ve looked hard for LED strips and even tried the expensive stuff but still haven’t found any ideal LED strips.
I took a look at the data sheet of the Samsungs and looks like they will be averaging above the BBL so it’s going to be on the green side unless you can select tint bins. I’m guess this is similar to the high cri Cree emitters that are famous for having the highest efficiencies but piss ugly tint.
I have those Modules in 3000K, 4000K and 5000K - none of them has any ugly tint - and I had a ton of 5m cheapo stripes with yellowish “warm” white or blueish “cold” white.
I plan to use the 3000k under kitchen cabinets and living room. The 4000k is great for garage. However, these lights emit too much blue wavelengths to be used in the bedroom. I’m going to buy 2700k for the bedroom.
Edit: I just installed the Sidawang 3000k under cabinet and at first I thought I accidentally installed the 4000k version because it looked so neutral white compared to my older 3000k led strips that were turned on at the same time. I then measured their CCT and surprisingly the Sidawang 3000k was actually about 50k warmer than my previous 3000k strips. My previous 3000k had a duv of 0.005x. The lower DUV on the Sidawang made it look 1000k cooler. Not sure if that is a good thing or not because I like some warmth in my emitters. I will try the 2700k and hopefully the very negative duv will make it look just right. Btw, I don’t really notice rosiness in the Sidawang 3000k in actual use. The older 3000k strip looks very yellow/lime in comparison though.
Yes, I have them installed on a dimmer. The colors really come to life. Huge difference when compared with the dozen or so other brand led strips I bought from Amazon and Aliexpress a few years ago which measured 57CRI to 68CRI, all with negative R9 values. Even the Sidawang one looks at least as good as the E21A 3000k in person if not better, probably because of the very negative DUV that makes things look whiter and cooler/neutral temperature. I haven’t installed the Marswalled but the R values look as good as the Optisolis and even higher than the Soraa Radiant light bulbs, which is supposed to be the highest CRI, highest light quality light bulb in the whole world. I wonder what emitters they are using. I hope to buy bulbs using these amazing emitters.