SKV89's LED Strips and bulbs test results

Great, thanks. You mentioned using 240v… but you’re in USA. Why not 120v?

Sorry I meant DC24V and DC12V

Many thanks for this numerous and impressive work SKV89!

Do you think you could, progressively, publish the missing R12 info? It would be perfect to help fill in our "BLF Ultra High CRI table".

Hi fneuf. Since I have all those strips stored away, it will take a lot of time to pull each one out and screw on power adapters to connect them. Therefore the chance for that is unlikely given how busy I am. But from what I remember it is always the R9 that is the lowest so R12 should always be higher.

Which Auxma 2400K 2835 where your favorite, SKV?

1) Auxma 2400K 2835 DC 12V 120LED/m 28.8w/m
2) Auxma 2400K 2835 DC 24V 120LED/m 28.8w/m
3) Auxma 2400K 2835 DC 12V 120LED/m 9.6w/m

The emitters used are the same so the color quality are identical. You choose the voltage and power output. 28.8w/m is much brighter

Alright, I had to ask because there are 3 separate entries in the data. I figured #1 and #2 were the same LEDs. But #3 has a notable drop in it’s R9. It could be the LEDs perform better at higher power.

Good catch. That is possible. The SST20 R9 and CRI values changes significantly with different current levels also

And a big thanks for making this data available on BLF! I placed an order last night for some high-cri led strips. I chose the “Auxma 2700K 2835 DC 12V 120LED/m 9.6w/m” based on your data. I wouldn’t have ventured into the $32 LED strips without your guidance :slight_smile:

Glad you found it helpful. The 2700k has a 103 Rg too so colors will pop.

I guess

and

are related, doesn't it? Which basically means strip #3 uses different, higher value current limiting resistors.

Anyone did some efficiency estimations for led strips? I think it causes a @#$% drop. I would prefer to buy led strips meant to be powered by led drivers, not only efficiency wouldn't suffer but also there would be no distance dimming problems.

I haven’t noticed any distance dimming issues. If you are concerned about efficiency, I suggest you get the 24V strips.

Excellent work.

The Gree LEDs look great value but inconsistent. I have some of their single SMD LEDs and they seem better quality than all other LEDs I’ve ever bought from aliexpress, but I only ever buy cheap junk!

This is great help to me also thank you.
Considering a E27 LED Corn Light Bulb for two car garage light.

Any idea if these are the same Marwalls that were tested here? I just installed some smart dimmers and i’m anxious to get some dimmable LEDs. Don’t have the patience to wait on the slow boat. :stuck_out_tongue:

Nice list, you have been busy!

I might have to try one myself, got some old strips under the kitchen counters that could use some upgrading.

I didn’t know where to put my latest finding…so I put it in here:
5V FOB strip, available in 3000K and 6000K. CRI80.
https://www.aliexpress.com/item/32954872800.html

Wow, that’s a lot of research there.
Some amazing specs among those strips.

Indeed, the high power LED manufacturers could perhaps learn a thing or 2 from this.

Thanks for doing this. :+1:

Great list!

I wish I had access to this before redoing my kitchen. I used Flexfire LED Strips and the DUV is def positive.

Thank you for doing all the work and recommending Auxma strips. I have purchased 2400K 3000K and 5000K rolls. Awesome light quality.

For the 24V 3000K strip, resistors are 56 ohms.

At the beginning of the strip, close to the power supply connector, there is a 3.46V drop on the resistor so LED current is 62mA.

3.46V is 14.4% of 24V so resistors waste 14.4% of total power, and LEDs get 85.6% of total power. Not so bad.

At the end of the 5m strip, 2.7V on the resistor, so only 48mA LED current. Thus 5m is a bit too long for a single power connection.

Note efficiency depends on LED color. For 24V having six white LEDs in series is okay, it wastes only a few volts in the resistor. But manufacturers use the same PCBs for all colors! So RED strips, with much lower Vf LEDs like 1.8-2V, will waste like 50% of the total power in the resistors… Not good!