Alibaba lm561c orders legit?

[jake.snake83]

I was wondering if anyone has ordered from Mufue company on Alibaba? They claim to sell different lm561c and lm301b configurations. I was quoted for 50pcs Samsung 96 diode lm561c sunstrips. They also list flexible strip rolls.

Can anyone recommend a distributor from Alibaba?

 

[Chip Green]

Oooh here we go!!!

 

[jake.snake83]

Can anyone also recommend a sane forum, where its public members help/answer or don't post at all?

 

[ApfelStrudel]

This is from Mufues. 12 boards were damaged during transport and they replaces them at no extra costs. However I can guarantee you those are not lm561c S6. B or b+ at best but at that price I really don't care. Driver were also reasonably priced. After the fiaaco with damaged boards I also squeezed one of their 320 board out of them for shipping fees only ($30).

 

[Pa-Nature]

View attachment 4276806

This is from Mufues. 12 boards were damaged during transport and they replaces them at no extra costs. However I can guarantee you those are not lm561c. B or b+ at best but at that price I really don't care. Driver were also reasonably priced. After the fiaaco with damaged boards I also squeezed one of their 320 board out of them for shipping fees only ($30).

how much for all ?

 

[ApfelStrudel]

how much for all ?

 

[Pa-Nature]

Thanks @ApfelStrudel

 

[Airwalker16]

View attachment 4276830

And this is for a build for a 4X4?
I'm super confused why they didn't give you HLG-320H-24A's and an HLG-120H-24A.
Those 320's at such a low current(1050) have SUCH HIGH voltages you're fuckin with, its scary.

 

[jake.snake83]

Thanks, I was worried bc I saw on another forum where they said something about Mufue used lm281b which I never heard of so I will have to look up the efficiency.

They are quoting me 50pcs for $6.50 each, 96 diode 44-48w just like the solstrips I already have. I was surprised bc I just bought 9 of them for $150.00 from a U.S. seller. Lm281b must draw the exact same power or something idk what is going on

 

[Airwalker16]

Thanks, I was worried bc I saw on another forum where they said something about Mufue used lm281b which I never heard of so I will have to look up the efficiency.

They are quoting me 50pcs for $6.50 each, 96 diode 44-48w just like the solstrips I already have. I was surprised bc I just bought 9 of them for $150.00 from a U.S. seller. Lm281b must draw the exact same power or something idk what is going on

Damn, already lowering the price.

 

[ApfelStrudel]

And this is for a build for a 4X4?
I'm super confused why they didn't give you HLG-320H-24A's and an HLG-120H-24A.
Those 320's at such a low current(1050) have SUCH HIGH voltages you're fuckin with, its scary.

Because those are the drivers I ordered. You're scared of DC voltage? Do your homework and do some research kid. 300V DC isn't gonna hurt you. 30kV gonna give you some burn marks and a blackout but still wont kill you.

Now have a look at power loses at 1 amp and at 13 amps in wiring alone and what gauge wire you need to avoid them.

 

[jake.snake83]

They quoted flexible Lm561c for $7.50 per meter(60 diodes).

It looks like lm281b gets 130lm/w so idk I guess the price is worth it
I think amperage is what can stop the heart, I read somewhere like .5 amps can kill someone....

 

[ApfelStrudel]

They quoted flexible Lm561c for $7.50 per meter(60 diodes).

It looks like lm281b gets 130lm/w so idk I guess the price is worth it
I think amperage is what can stop the heart, I read somewhere like .5 amps can kill someone....

The frequency is gonna fuck with your heart, those 50/60Hz from mains. DC doesn't have frequency (in theory, this drivers run at much higher frequency that's not gonna mess with your heart). Besides you're not really standing in a grounded room with metal floor covered in water and bare foot while you're at it, now do you?

 

[jake.snake83]

Ill make sure to avoid doing that....Anyway thank you for your time, I was unsure if Mufue was a decent company,

 

[Airwalker16]

Because those are the drivers I ordered. You're scared of DC voltage? Do your homework and do some research kid. 300V DC isn't gonna hurt you. 30kV gonna give you some burn marks and a blackout but still wont kill you.

Now have a look at power loses at 1 amp and at 13 amps in wiring alone and what gauge wire you need to avoid them.

True @Randomblame ?

 

[Airwalker16]

So did you have an end product with all those components? 50 strips is a lot.

 

[Airwalker16]

And at 1050MA & 24Vf, the 320 can only run like what, 15-17 strips? Shouldn't the 120 have been another 320 for the remaining set of 16-17?

 

[ANC]

I would expect the drivers to run above 40kHz, to prevent banding in photographs among other things.
I know the IC based drivers I have build, all worked on that principle, and was part of why they needed those giant arse inductors and electrolytics on the old stuff.

 

[ApfelStrudel]

I would expect the drivers to run above 40kHz, to prevent banding in photographs among other things.
I know the IC based drivers I have build, all worked on that principle, and was part of why they needed those giant arse inductors and electrolytics on the old stuff.

100-200kHz

 

[ApfelStrudel]

And at 1050MA & 24Vf, the 320 can only run like what, 15-17 strips? Shouldn't the 120 have been another 320 for the remaining set of 16-17?

Why do you keep drawing conclusions and skipping info?

I stated in another thread that the 2 320's are for the flower room in build. 120 is running in a veg box at 146W.

Please do some math and check some datasheets too. Those strips are running at 24V nominal. On a 1050mA driver the Vf is 23.16V. Thats about 86mA per chip or about 25W per strip. Max output on 320 is 305V. 305V/23.16= 13.17 or analogue 13 strips pull 301.08V so there are 3.92V headroom to full load and highest efficiency.