Anyone used Atreum Lighting 288.2 qbs?

https://atreumlighting.com/

Anyone bought qbs off this site before?
They are selling 288 diode qbs with samsung LMC561bs + heatsink for $75usd which seems like a really good price.
I messaged them about warranty and they said its 1 year and they are releasing a ppfd chart soon.
Could probly build a 4 board 480w setup for under $500usd.
Was thinking of purchasing and was wondering if anyone had any experience with these guys.

Better take four 288.2, they use LM301b and costs the same 75$ inkl. heatsink. 5-10% better than LM561c and probably up to 15-20% better like LM561b.

I don't understand why more manufacturers don't build these boards with the thought of not needing a heatsink more in mind. They're so unnecessary if you just use the right board material and space the diodes correctly.

Randomblame said:

Better take four 288.2, they use LM301b and costs the same 75$ inkl. heatsink. 5-10% better than LM561c and probably up to 15-20% better like LM561b.

Click to expand...

This doesn't make sense to me... 5-10% what and 15-20% what??

Ugh, more boards. Just get strips. Much better suited.

These are alibaba boards as well. There is a thread on grass city and a post with a guy buying 100 of each kind.
Of course, not that it really matters. Just sayin

Airwalker16 said:

This doesn't make sense to me... 5-10% what and 15-20% what??

Click to expand...

No, it doesn't?
Let me try with other words...
LM301b(up to 220lm/w) is ~5-10% than LM561c depending on spectrum(up to 210lm/w),
LM561c ~15% better than LM561b(185lm/w) and LM301b is probably ~20% better.